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Finding the Fourth Proportional to 261,816.12, 392,865.12 and 104,045.94

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Solution

The fourth proportional to 261,816.12, 392,865.12 and 104,045.94 is: 156,124.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,816.12 : 392,865.12 = 104,045.94 : x
  2. Step 2: Convert to fraction form
    261,816.12/392,865.12 = 104,045.94/x
  3. Step 3: Cross multiply
    261,816.12x = 392,865.12 × 104,045.94
  4. Step 4: Simplify right side
    261,816.12x = 40,876,020,703.61
  5. Step 5: Solve for x
    x = 40,876,020,703.61/261,816.12
  6. Step 6: Final answer
    x = 156,124.92

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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.