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Finding the Fourth Proportional to 74,470.61, 102,769.26 and 40,479.10

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Solution

The fourth proportional to 74,470.61, 102,769.26 and 40,479.10 is: 55,861.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,470.61 : 102,769.26 = 40,479.10 : x
  2. Step 2: Convert to fraction form
    74,470.61/102,769.26 = 40,479.10/x
  3. Step 3: Cross multiply
    74,470.61x = 102,769.26 × 40,479.10
  4. Step 4: Simplify right side
    74,470.61x = 4,160,006,743.75
  5. Step 5: Solve for x
    x = 4,160,006,743.75/74,470.61
  6. Step 6: Final answer
    x = 55,861.05

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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.