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Finding the Fourth Proportional to 131,781.80, 197,672.70 and 57,909.80

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Solution

The fourth proportional to 131,781.80, 197,672.70 and 57,909.80 is: 86,864.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,781.80 : 197,672.70 = 57,909.80 : x
  2. Step 2: Convert to fraction form
    131,781.80/197,672.70 = 57,909.80/x
  3. Step 3: Cross multiply
    131,781.80x = 197,672.70 × 57,909.80
  4. Step 4: Simplify right side
    131,781.80x = 11,447,186,522.46
  5. Step 5: Solve for x
    x = 11,447,186,522.46/131,781.80
  6. Step 6: Final answer
    x = 86,864.70

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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.