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Finding the Fourth Proportional to 100,733.40, 138,956.84 and 62,479.74

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Solution

The fourth proportional to 100,733.40, 138,956.84 and 62,479.74 is: 86,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,733.40 : 138,956.84 = 62,479.74 : x
  2. Step 2: Convert to fraction form
    100,733.40/138,956.84 = 62,479.74/x
  3. Step 3: Cross multiply
    100,733.40x = 138,956.84 × 62,479.74
  4. Step 4: Simplify right side
    100,733.40x = 8,681,987,234.42
  5. Step 5: Solve for x
    x = 8,681,987,234.42/100,733.40
  6. Step 6: Final answer
    x = 86,187.77

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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.