Home / 261,979.20-392,968.80-74,990.70

Finding the Fourth Proportional to 261,979.20, 392,968.80 and 74,990.70

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Solution

The fourth proportional to 261,979.20, 392,968.80 and 74,990.70 is: 112,486.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,979.20 : 392,968.80 = 74,990.70 : x
  2. Step 2: Convert to fraction form
    261,979.20/392,968.80 = 74,990.70/x
  3. Step 3: Cross multiply
    261,979.20x = 392,968.80 × 74,990.70
  4. Step 4: Simplify right side
    261,979.20x = 29,469,005,390.16
  5. Step 5: Solve for x
    x = 29,469,005,390.16/261,979.20
  6. Step 6: Final answer
    x = 112,486.05

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1.5x scale

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.