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Finding the Fourth Proportional to 85,222.40, 127,832.40 and 38,475.20

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Solution

The fourth proportional to 85,222.40, 127,832.40 and 38,475.20 is: 57,712.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,222.40 : 127,832.40 = 38,475.20 : x
  2. Step 2: Convert to fraction form
    85,222.40/127,832.40 = 38,475.20/x
  3. Step 3: Cross multiply
    85,222.40x = 127,832.40 × 38,475.20
  4. Step 4: Simplify right side
    85,222.40x = 4,918,377,156.48
  5. Step 5: Solve for x
    x = 4,918,377,156.48/85,222.40
  6. Step 6: Final answer
    x = 57,712.26

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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.