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Finding the Fourth Proportional to 100,332.72, 138,552.89 and 64,584.86

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Solution

The fourth proportional to 100,332.72, 138,552.89 and 64,584.86 is: 89,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,332.72 : 138,552.89 = 64,584.86 : x
  2. Step 2: Convert to fraction form
    100,332.72/138,552.89 = 64,584.86/x
  3. Step 3: Cross multiply
    100,332.72x = 138,552.89 × 64,584.86
  4. Step 4: Simplify right side
    100,332.72x = 8,948,417,987.56
  5. Step 5: Solve for x
    x = 8,948,417,987.56/100,332.72
  6. Step 6: Final answer
    x = 89,187.44

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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.