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Finding the Fourth Proportional to 157,211.67, 216,951.78 and 85,591.07

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Solution

The fourth proportional to 157,211.67, 216,951.78 and 85,591.07 is: 118,115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,211.67 : 216,951.78 = 85,591.07 : x
  2. Step 2: Convert to fraction form
    157,211.67/216,951.78 = 85,591.07/x
  3. Step 3: Cross multiply
    157,211.67x = 216,951.78 × 85,591.07
  4. Step 4: Simplify right side
    157,211.67x = 18,569,134,988.60
  5. Step 5: Solve for x
    x = 18,569,134,988.60/157,211.67
  6. Step 6: Final answer
    x = 118,115.50

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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.