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Finding the Fourth Proportional to 100,373.58, 138,575.61 and 62,698.86

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Solution

The fourth proportional to 100,373.58, 138,575.61 and 62,698.86 is: 86,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,373.58 : 138,575.61 = 62,698.86 : x
  2. Step 2: Convert to fraction form
    100,373.58/138,575.61 = 62,698.86/x
  3. Step 3: Cross multiply
    100,373.58x = 138,575.61 × 62,698.86
  4. Step 4: Simplify right side
    100,373.58x = 8,688,532,770.80
  5. Step 5: Solve for x
    x = 8,688,532,770.80/100,373.58
  6. Step 6: Final answer
    x = 86,561.95

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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.