Home / 86,287.32-129,490.11-30,127.44

Finding the Fourth Proportional to 86,287.32, 129,490.11 and 30,127.44

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Solution

The fourth proportional to 86,287.32, 129,490.11 and 30,127.44 is: 45,211.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,287.32 : 129,490.11 = 30,127.44 : x
  2. Step 2: Convert to fraction form
    86,287.32/129,490.11 = 30,127.44/x
  3. Step 3: Cross multiply
    86,287.32x = 129,490.11 × 30,127.44
  4. Step 4: Simplify right side
    86,287.32x = 3,901,205,519.62
  5. Step 5: Solve for x
    x = 3,901,205,519.62/86,287.32
  6. Step 6: Final answer
    x = 45,211.81

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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.