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Finding the Fourth Proportional to 100,683.49, 138,946.24 and 55,359.13

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Solution

The fourth proportional to 100,683.49, 138,946.24 and 55,359.13 is: 76,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,683.49 : 138,946.24 = 55,359.13 : x
  2. Step 2: Convert to fraction form
    100,683.49/138,946.24 = 55,359.13/x
  3. Step 3: Cross multiply
    100,683.49x = 138,946.24 × 55,359.13
  4. Step 4: Simplify right side
    100,683.49x = 7,691,942,963.17
  5. Step 5: Solve for x
    x = 7,691,942,963.17/100,683.49
  6. Step 6: Final answer
    x = 76,397.26

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1.5x scale

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.