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Finding the Fourth Proportional to 243,887.61, 365,866.65 and 75,421.83

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Solution

The fourth proportional to 243,887.61, 365,866.65 and 75,421.83 is: 113,143.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,887.61 : 365,866.65 = 75,421.83 : x
  2. Step 2: Convert to fraction form
    243,887.61/365,866.65 = 75,421.83/x
  3. Step 3: Cross multiply
    243,887.61x = 365,866.65 × 75,421.83
  4. Step 4: Simplify right side
    243,887.61x = 27,594,332,278.97
  5. Step 5: Solve for x
    x = 27,594,332,278.97/243,887.61
  6. Step 6: Final answer
    x = 113,143.64

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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.