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Finding the Fourth Proportional to 218,926.71, 328,403.91 and 92,543.40

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Solution

The fourth proportional to 218,926.71, 328,403.91 and 92,543.40 is: 138,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,926.71 : 328,403.91 = 92,543.40 : x
  2. Step 2: Convert to fraction form
    218,926.71/328,403.91 = 92,543.40/x
  3. Step 3: Cross multiply
    218,926.71x = 328,403.91 × 92,543.40
  4. Step 4: Simplify right side
    218,926.71x = 30,391,614,404.69
  5. Step 5: Solve for x
    x = 30,391,614,404.69/218,926.71
  6. Step 6: Final answer
    x = 138,820.95

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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.