Home / 261,961.20-392,488.20-121,431.60

Finding the Fourth Proportional to 261,961.20, 392,488.20 and 121,431.60

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Solution

The fourth proportional to 261,961.20, 392,488.20 and 121,431.60 is: 181,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,961.20 : 392,488.20 = 121,431.60 : x
  2. Step 2: Convert to fraction form
    261,961.20/392,488.20 = 121,431.60/x
  3. Step 3: Cross multiply
    261,961.20x = 392,488.20 × 121,431.60
  4. Step 4: Simplify right side
    261,961.20x = 47,660,470,107.12
  5. Step 5: Solve for x
    x = 47,660,470,107.12/261,961.20
  6. Step 6: Final answer
    x = 181,937.13

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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.