Home / 86,581.20-129,870.44-71,758.84

Finding the Fourth Proportional to 86,581.20, 129,870.44 and 71,758.84

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Solution

The fourth proportional to 86,581.20, 129,870.44 and 71,758.84 is: 107,637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,581.20 : 129,870.44 = 71,758.84 : x
  2. Step 2: Convert to fraction form
    86,581.20/129,870.44 = 71,758.84/x
  3. Step 3: Cross multiply
    86,581.20x = 129,870.44 × 71,758.84
  4. Step 4: Simplify right side
    86,581.20x = 9,319,352,124.69
  5. Step 5: Solve for x
    x = 9,319,352,124.69/86,581.20
  6. Step 6: Final answer
    x = 107,637.13

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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.