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Finding the Fourth Proportional to 86,691.72, 130,035.66 and 39,944.58

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Solution

The fourth proportional to 86,691.72, 130,035.66 and 39,944.58 is: 59,915.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,691.72 : 130,035.66 = 39,944.58 : x
  2. Step 2: Convert to fraction form
    86,691.72/130,035.66 = 39,944.58/x
  3. Step 3: Cross multiply
    86,691.72x = 130,035.66 × 39,944.58
  4. Step 4: Simplify right side
    86,691.72x = 5,194,219,823.72
  5. Step 5: Solve for x
    x = 5,194,219,823.72/86,691.72
  6. Step 6: Final answer
    x = 59,915.99

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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.