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Finding the Fourth Proportional to 159,915.88, 239,874.63 and 66,421.72

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Solution

The fourth proportional to 159,915.88, 239,874.63 and 66,421.72 is: 99,632.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,915.88 : 239,874.63 = 66,421.72 : x
  2. Step 2: Convert to fraction form
    159,915.88/239,874.63 = 66,421.72/x
  3. Step 3: Cross multiply
    159,915.88x = 239,874.63 × 66,421.72
  4. Step 4: Simplify right side
    159,915.88x = 15,932,885,508.96
  5. Step 5: Solve for x
    x = 15,932,885,508.96/159,915.88
  6. Step 6: Final answer
    x = 99,632.92

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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.