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Finding the Fourth Proportional to 243,530.76, 365,332.60 and 85,731.44

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Solution

The fourth proportional to 243,530.76, 365,332.60 and 85,731.44 is: 128,610.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,530.76 : 365,332.60 = 85,731.44 : x
  2. Step 2: Convert to fraction form
    243,530.76/365,332.60 = 85,731.44/x
  3. Step 3: Cross multiply
    243,530.76x = 365,332.60 × 85,731.44
  4. Step 4: Simplify right side
    243,530.76x = 31,320,489,876.94
  5. Step 5: Solve for x
    x = 31,320,489,876.94/243,530.76
  6. Step 6: Final answer
    x = 128,610.00

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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.