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Finding the Fourth Proportional to 261,859.89, 392,812.62 and 72,320.52

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Solution

The fourth proportional to 261,859.89, 392,812.62 and 72,320.52 is: 108,487.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,859.89 : 392,812.62 = 72,320.52 : x
  2. Step 2: Convert to fraction form
    261,859.89/392,812.62 = 72,320.52/x
  3. Step 3: Cross multiply
    261,859.89x = 392,812.62 × 72,320.52
  4. Step 4: Simplify right side
    261,859.89x = 28,408,412,940.96
  5. Step 5: Solve for x
    x = 28,408,412,940.96/261,859.89
  6. Step 6: Final answer
    x = 108,487.07

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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.