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Finding the Fourth Proportional to 56,981.61, 85,469.85 and 38,269.53

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Solution

The fourth proportional to 56,981.61, 85,469.85 and 38,269.53 is: 57,402.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,981.61 : 85,469.85 = 38,269.53 : x
  2. Step 2: Convert to fraction form
    56,981.61/85,469.85 = 38,269.53/x
  3. Step 3: Cross multiply
    56,981.61x = 85,469.85 × 38,269.53
  4. Step 4: Simplify right side
    56,981.61x = 3,270,890,988.67
  5. Step 5: Solve for x
    x = 3,270,890,988.67/56,981.61
  6. Step 6: Final answer
    x = 57,402.57

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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.