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Finding the Fourth Proportional to 101,207.88, 139,553.28 and 65,350.80

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Solution

The fourth proportional to 101,207.88, 139,553.28 and 65,350.80 is: 90,110.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,207.88 : 139,553.28 = 65,350.80 : x
  2. Step 2: Convert to fraction form
    101,207.88/139,553.28 = 65,350.80/x
  3. Step 3: Cross multiply
    101,207.88x = 139,553.28 × 65,350.80
  4. Step 4: Simplify right side
    101,207.88x = 9,119,918,490.62
  5. Step 5: Solve for x
    x = 9,119,918,490.62/101,207.88
  6. Step 6: Final answer
    x = 90,110.76

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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.