Home / 78,156.09-117,245.07-25,555.10

Finding the Fourth Proportional to 78,156.09, 117,245.07 and 25,555.10

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Solution

The fourth proportional to 78,156.09, 117,245.07 and 25,555.10 is: 38,336.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.09 : 117,245.07 = 25,555.10 : x
  2. Step 2: Convert to fraction form
    78,156.09/117,245.07 = 25,555.10/x
  3. Step 3: Cross multiply
    78,156.09x = 117,245.07 × 25,555.10
  4. Step 4: Simplify right side
    78,156.09x = 2,996,208,902.13
  5. Step 5: Solve for x
    x = 2,996,208,902.13/78,156.09
  6. Step 6: Final answer
    x = 38,336.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.