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Finding the Fourth Proportional to 261,862.89, 392,817.12 and 72,323.52

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Solution

The fourth proportional to 261,862.89, 392,817.12 and 72,323.52 is: 108,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,862.89 : 392,817.12 = 72,323.52 : x
  2. Step 2: Convert to fraction form
    261,862.89/392,817.12 = 72,323.52/x
  3. Step 3: Cross multiply
    261,862.89x = 392,817.12 × 72,323.52
  4. Step 4: Simplify right side
    261,862.89x = 28,409,916,834.66
  5. Step 5: Solve for x
    x = 28,409,916,834.66/261,862.89
  6. Step 6: Final answer
    x = 108,491.57

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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.