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Finding the Fourth Proportional to 128,543.55, 192,770.16 and 38,559.43

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Solution

The fourth proportional to 128,543.55, 192,770.16 and 38,559.43 is: 57,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,543.55 : 192,770.16 = 38,559.43 : x
  2. Step 2: Convert to fraction form
    128,543.55/192,770.16 = 38,559.43/x
  3. Step 3: Cross multiply
    128,543.55x = 192,770.16 × 38,559.43
  4. Step 4: Simplify right side
    128,543.55x = 7,433,107,490.61
  5. Step 5: Solve for x
    x = 7,433,107,490.61/128,543.55
  6. Step 6: Final answer
    x = 57,825.60

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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.