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Finding the Fourth Proportional to 157,492.72, 217,335.20 and 85,874.12

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Solution

The fourth proportional to 157,492.72, 217,335.20 and 85,874.12 is: 118,503.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,492.72 : 217,335.20 = 85,874.12 : x
  2. Step 2: Convert to fraction form
    157,492.72/217,335.20 = 85,874.12/x
  3. Step 3: Cross multiply
    157,492.72x = 217,335.20 × 85,874.12
  4. Step 4: Simplify right side
    157,492.72x = 18,663,469,045.02
  5. Step 5: Solve for x
    x = 18,663,469,045.02/157,492.72
  6. Step 6: Final answer
    x = 118,503.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.