Home / 86,857.62-129,990.57-72,833.50

Finding the Fourth Proportional to 86,857.62, 129,990.57 and 72,833.50

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Solution

The fourth proportional to 86,857.62, 129,990.57 and 72,833.50 is: 109,002.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,857.62 : 129,990.57 = 72,833.50 : x
  2. Step 2: Convert to fraction form
    86,857.62/129,990.57 = 72,833.50/x
  3. Step 3: Cross multiply
    86,857.62x = 129,990.57 × 72,833.50
  4. Step 4: Simplify right side
    86,857.62x = 9,467,668,180.10
  5. Step 5: Solve for x
    x = 9,467,668,180.10/86,857.62
  6. Step 6: Final answer
    x = 109,002.16

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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.