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Finding the Fourth Proportional to 243,550.61, 365,261.90 and 72,731.79

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Solution

The fourth proportional to 243,550.61, 365,261.90 and 72,731.79 is: 109,078.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,550.61 : 365,261.90 = 72,731.79 : x
  2. Step 2: Convert to fraction form
    243,550.61/365,261.90 = 72,731.79/x
  3. Step 3: Cross multiply
    243,550.61x = 365,261.90 × 72,731.79
  4. Step 4: Simplify right side
    243,550.61x = 26,566,149,615.83
  5. Step 5: Solve for x
    x = 26,566,149,615.83/243,550.61
  6. Step 6: Final answer
    x = 109,078.56

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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.