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Finding the Fourth Proportional to 351,421.70, 527,132.50 and 85,182.21

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Solution

The fourth proportional to 351,421.70, 527,132.50 and 85,182.21 is: 127,773.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,421.70 : 527,132.50 = 85,182.21 : x
  2. Step 2: Convert to fraction form
    351,421.70/527,132.50 = 85,182.21/x
  3. Step 3: Cross multiply
    351,421.70x = 527,132.50 × 85,182.21
  4. Step 4: Simplify right side
    351,421.70x = 44,902,311,099.87
  5. Step 5: Solve for x
    x = 44,902,311,099.87/351,421.70
  6. Step 6: Final answer
    x = 127,773.30

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1.5x scale

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.