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Finding the Fourth Proportional to 134,614.78, 185,769.65 and 74,187.63

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Solution

The fourth proportional to 134,614.78, 185,769.65 and 74,187.63 is: 102,379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,614.78 : 185,769.65 = 74,187.63 : x
  2. Step 2: Convert to fraction form
    134,614.78/185,769.65 = 74,187.63/x
  3. Step 3: Cross multiply
    134,614.78x = 185,769.65 × 74,187.63
  4. Step 4: Simplify right side
    134,614.78x = 13,781,810,244.90
  5. Step 5: Solve for x
    x = 13,781,810,244.90/134,614.78
  6. Step 6: Final answer
    x = 102,379.62

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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.