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Finding the Fourth Proportional to 97,419.20, 146,128.80 and 86,593.55

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Solution

The fourth proportional to 97,419.20, 146,128.80 and 86,593.55 is: 129,890.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,419.20 : 146,128.80 = 86,593.55 : x
  2. Step 2: Convert to fraction form
    97,419.20/146,128.80 = 86,593.55/x
  3. Step 3: Cross multiply
    97,419.20x = 146,128.80 × 86,593.55
  4. Step 4: Simplify right side
    97,419.20x = 12,653,811,549.24
  5. Step 5: Solve for x
    x = 12,653,811,549.24/97,419.20
  6. Step 6: Final answer
    x = 129,890.33

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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.