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Finding the Fourth Proportional to 57,059.78, 78,760.82 and 40,068.14

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Solution

The fourth proportional to 57,059.78, 78,760.82 and 40,068.14 is: 55,306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,059.78 : 78,760.82 = 40,068.14 : x
  2. Step 2: Convert to fraction form
    57,059.78/78,760.82 = 40,068.14/x
  3. Step 3: Cross multiply
    57,059.78x = 78,760.82 × 40,068.14
  4. Step 4: Simplify right side
    57,059.78x = 3,155,799,268.64
  5. Step 5: Solve for x
    x = 3,155,799,268.64/57,059.78
  6. Step 6: Final answer
    x = 55,306.90

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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.