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Finding the Fourth Proportional to 261,917.01, 392,885.25 and 84,426.57

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Solution

The fourth proportional to 261,917.01, 392,885.25 and 84,426.57 is: 126,642.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,917.01 : 392,885.25 = 84,426.57 : x
  2. Step 2: Convert to fraction form
    261,917.01/392,885.25 = 84,426.57/x
  3. Step 3: Cross multiply
    261,917.01x = 392,885.25 × 84,426.57
  4. Step 4: Simplify right side
    261,917.01x = 33,169,954,061.09
  5. Step 5: Solve for x
    x = 33,169,954,061.09/261,917.01
  6. Step 6: Final answer
    x = 126,642.99

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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.