Home / 78,505.90-108,338.94-42,696.70

Finding the Fourth Proportional to 78,505.90, 108,338.94 and 42,696.70

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Solution

The fourth proportional to 78,505.90, 108,338.94 and 42,696.70 is: 58,921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,505.90 : 108,338.94 = 42,696.70 : x
  2. Step 2: Convert to fraction form
    78,505.90/108,338.94 = 42,696.70/x
  3. Step 3: Cross multiply
    78,505.90x = 108,338.94 × 42,696.70
  4. Step 4: Simplify right side
    78,505.90x = 4,625,715,219.50
  5. Step 5: Solve for x
    x = 4,625,715,219.50/78,505.90
  6. Step 6: Final answer
    x = 58,921.88

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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.