Home / 78,517,987.23-108,284,284.65-49,151,996.89

Finding the Fourth Proportional to 78,517,987.23, 108,284,284.65 and 49,151,996.89

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Solution

The fourth proportional to 78,517,987.23, 108,284,284.65 and 49,151,996.89 is: 67,785,599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517,987.23 : 108,284,284.65 = 49,151,996.89 : x
  2. Step 2: Convert to fraction form
    78,517,987.23/108,284,284.65 = 49,151,996.89/x
  3. Step 3: Cross multiply
    78,517,987.23x = 108,284,284.65 × 49,151,996.89
  4. Step 4: Simplify right side
    78,517,987.23x = 5,322,388,822,266,284
  5. Step 5: Solve for x
    x = 5,322,388,822,266,284/78,517,987.23
  6. Step 6: Final answer
    x = 67,785,599.33

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.