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Finding the Fourth Proportional to 86,571.40, 129,857.10 and 72,793.30

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Solution

The fourth proportional to 86,571.40, 129,857.10 and 72,793.30 is: 109,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,571.40 : 129,857.10 = 72,793.30 : x
  2. Step 2: Convert to fraction form
    86,571.40/129,857.10 = 72,793.30/x
  3. Step 3: Cross multiply
    86,571.40x = 129,857.10 × 72,793.30
  4. Step 4: Simplify right side
    86,571.40x = 9,452,726,837.43
  5. Step 5: Solve for x
    x = 9,452,726,837.43/86,571.40
  6. Step 6: Final answer
    x = 109,189.95

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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.