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Finding the Fourth Proportional to 261,780.12, 392,811.12 and 104,009.94

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Solution

The fourth proportional to 261,780.12, 392,811.12 and 104,009.94 is: 156,070.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,780.12 : 392,811.12 = 104,009.94 : x
  2. Step 2: Convert to fraction form
    261,780.12/392,811.12 = 104,009.94/x
  3. Step 3: Cross multiply
    261,780.12x = 392,811.12 × 104,009.94
  4. Step 4: Simplify right side
    261,780.12x = 40,856,261,022.53
  5. Step 5: Solve for x
    x = 40,856,261,022.53/261,780.12
  6. Step 6: Final answer
    x = 156,070.91

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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.