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Finding the Fourth Proportional to 100,250.64, 138,283.32 and 64,487.28

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Solution

The fourth proportional to 100,250.64, 138,283.32 and 64,487.28 is: 88,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,250.64 : 138,283.32 = 64,487.28 : x
  2. Step 2: Convert to fraction form
    100,250.64/138,283.32 = 64,487.28/x
  3. Step 3: Cross multiply
    100,250.64x = 138,283.32 × 64,487.28
  4. Step 4: Simplify right side
    100,250.64x = 8,917,515,176.17
  5. Step 5: Solve for x
    x = 8,917,515,176.17/100,250.64
  6. Step 6: Final answer
    x = 88,952.20

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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.