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Finding the Fourth Proportional to 74,682.76, 103,061.88 and 40,691.16

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Solution

The fourth proportional to 74,682.76, 103,061.88 and 40,691.16 is: 56,153.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,682.76 : 103,061.88 = 40,691.16 : x
  2. Step 2: Convert to fraction form
    74,682.76/103,061.88 = 40,691.16/x
  3. Step 3: Cross multiply
    74,682.76x = 103,061.88 × 40,691.16
  4. Step 4: Simplify right side
    74,682.76x = 4,193,707,448.98
  5. Step 5: Solve for x
    x = 4,193,707,448.98/74,682.76
  6. Step 6: Final answer
    x = 56,153.62

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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.