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Finding the Fourth Proportional to 74,700.10, 103,086.16 and 40,708.60

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Solution

The fourth proportional to 74,700.10, 103,086.16 and 40,708.60 is: 56,177.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,700.10 : 103,086.16 = 40,708.60 : x
  2. Step 2: Convert to fraction form
    74,700.10/103,086.16 = 40,708.60/x
  3. Step 3: Cross multiply
    74,700.10x = 103,086.16 × 40,708.60
  4. Step 4: Simplify right side
    74,700.10x = 4,196,493,252.98
  5. Step 5: Solve for x
    x = 4,196,493,252.98/74,700.10
  6. Step 6: Final answer
    x = 56,177.88

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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.