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Finding the Fourth Proportional to 261,709.80, 392,564.64 and 84,230.64

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Solution

The fourth proportional to 261,709.80, 392,564.64 and 84,230.64 is: 126,345.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,709.80 : 392,564.64 = 84,230.64 : x
  2. Step 2: Convert to fraction form
    261,709.80/392,564.64 = 84,230.64/x
  3. Step 3: Cross multiply
    261,709.80x = 392,564.64 × 84,230.64
  4. Step 4: Simplify right side
    261,709.80x = 33,065,970,868.57
  5. Step 5: Solve for x
    x = 33,065,970,868.57/261,709.80
  6. Step 6: Final answer
    x = 126,345.94

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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.