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Finding the Fourth Proportional to 100,332, 138,479.76 and 60,054.75

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Solution

The fourth proportional to 100,332, 138,479.76 and 60,054.75 is: 82,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,332 : 138,479.76 = 60,054.75 : x
  2. Step 2: Convert to fraction form
    100,332/138,479.76 = 60,054.75/x
  3. Step 3: Cross multiply
    100,332x = 138,479.76 × 60,054.75
  4. Step 4: Simplify right side
    100,332x = 8,316,367,366.86
  5. Step 5: Solve for x
    x = 8,316,367,366.86/100,332
  6. Step 6: Final answer
    x = 82,888.48

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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.