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Finding the Fourth Proportional to 261,363.65, 392,100.21 and 81,444.69

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Solution

The fourth proportional to 261,363.65, 392,100.21 and 81,444.69 is: 122,184.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,363.65 : 392,100.21 = 81,444.69 : x
  2. Step 2: Convert to fraction form
    261,363.65/392,100.21 = 81,444.69/x
  3. Step 3: Cross multiply
    261,363.65x = 392,100.21 × 81,444.69
  4. Step 4: Simplify right side
    261,363.65x = 31,934,480,052.38
  5. Step 5: Solve for x
    x = 31,934,480,052.38/261,363.65
  6. Step 6: Final answer
    x = 122,184.09

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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.