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Finding the Fourth Proportional to 207,717.10, 311,575.65 and 128,574.70

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Solution

The fourth proportional to 207,717.10, 311,575.65 and 128,574.70 is: 192,862.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,717.10 : 311,575.65 = 128,574.70 : x
  2. Step 2: Convert to fraction form
    207,717.10/311,575.65 = 128,574.70/x
  3. Step 3: Cross multiply
    207,717.10x = 311,575.65 × 128,574.70
  4. Step 4: Simplify right side
    207,717.10x = 40,060,745,726.06
  5. Step 5: Solve for x
    x = 40,060,745,726.06/207,717.10
  6. Step 6: Final answer
    x = 192,862.05

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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.