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Finding the Fourth Proportional to 111,508.71, 153,812.03 and 66,154.59

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Solution

The fourth proportional to 111,508.71, 153,812.03 and 66,154.59 is: 91,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,508.71 : 153,812.03 = 66,154.59 : x
  2. Step 2: Convert to fraction form
    111,508.71/153,812.03 = 66,154.59/x
  3. Step 3: Cross multiply
    111,508.71x = 153,812.03 × 66,154.59
  4. Step 4: Simplify right side
    111,508.71x = 10,175,371,781.72
  5. Step 5: Solve for x
    x = 10,175,371,781.72/111,508.71
  6. Step 6: Final answer
    x = 91,251.81

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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.