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Finding the Fourth Proportional to 56,403.88, 84,648.30 and 38,591.92

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Solution

The fourth proportional to 56,403.88, 84,648.30 and 38,591.92 is: 57,916.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,403.88 : 84,648.30 = 38,591.92 : x
  2. Step 2: Convert to fraction form
    56,403.88/84,648.30 = 38,591.92/x
  3. Step 3: Cross multiply
    56,403.88x = 84,648.30 × 38,591.92
  4. Step 4: Simplify right side
    56,403.88x = 3,266,740,421.74
  5. Step 5: Solve for x
    x = 3,266,740,421.74/56,403.88
  6. Step 6: Final answer
    x = 57,916.95

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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.