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Finding the Fourth Proportional to 215,062.40, 322,593.60 and 57,315.20

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Solution

The fourth proportional to 215,062.40, 322,593.60 and 57,315.20 is: 85,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,062.40 : 322,593.60 = 57,315.20 : x
  2. Step 2: Convert to fraction form
    215,062.40/322,593.60 = 57,315.20/x
  3. Step 3: Cross multiply
    215,062.40x = 322,593.60 × 57,315.20
  4. Step 4: Simplify right side
    215,062.40x = 18,489,516,702.72
  5. Step 5: Solve for x
    x = 18,489,516,702.72/215,062.40
  6. Step 6: Final answer
    x = 85,972.80

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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.