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Finding the Fourth Proportional to 119,666.68, 165,168.16 and 74,378.87

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Solution

The fourth proportional to 119,666.68, 165,168.16 and 74,378.87 is: 102,660.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,666.68 : 165,168.16 = 74,378.87 : x
  2. Step 2: Convert to fraction form
    119,666.68/165,168.16 = 74,378.87/x
  3. Step 3: Cross multiply
    119,666.68x = 165,168.16 × 74,378.87
  4. Step 4: Simplify right side
    119,666.68x = 12,285,021,100.78
  5. Step 5: Solve for x
    x = 12,285,021,100.78/119,666.68
  6. Step 6: Final answer
    x = 102,660.33

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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.