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Finding the Fourth Proportional to 66,387.69, 99,529.68 and 45,275.39

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Solution

The fourth proportional to 66,387.69, 99,529.68 and 45,275.39 is: 67,877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,387.69 : 99,529.68 = 45,275.39 : x
  2. Step 2: Convert to fraction form
    66,387.69/99,529.68 = 45,275.39/x
  3. Step 3: Cross multiply
    66,387.69x = 99,529.68 × 45,275.39
  4. Step 4: Simplify right side
    66,387.69x = 4,506,244,580.93
  5. Step 5: Solve for x
    x = 4,506,244,580.93/66,387.69
  6. Step 6: Final answer
    x = 67,877.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.