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Finding the Fourth Proportional to 92,479.20, 138,718.80 and 82,637.70

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Solution

The fourth proportional to 92,479.20, 138,718.80 and 82,637.70 is: 123,956.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,479.20 : 138,718.80 = 82,637.70 : x
  2. Step 2: Convert to fraction form
    92,479.20/138,718.80 = 82,637.70/x
  3. Step 3: Cross multiply
    92,479.20x = 138,718.80 × 82,637.70
  4. Step 4: Simplify right side
    92,479.20x = 11,463,402,578.76
  5. Step 5: Solve for x
    x = 11,463,402,578.76/92,479.20
  6. Step 6: Final answer
    x = 123,956.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.