Home / 89,964.80-134,947.20-86,125.40

Finding the Fourth Proportional to 89,964.80, 134,947.20 and 86,125.40

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Solution

The fourth proportional to 89,964.80, 134,947.20 and 86,125.40 is: 129,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,964.80 : 134,947.20 = 86,125.40 : x
  2. Step 2: Convert to fraction form
    89,964.80/134,947.20 = 86,125.40/x
  3. Step 3: Cross multiply
    89,964.80x = 134,947.20 × 86,125.40
  4. Step 4: Simplify right side
    89,964.80x = 11,622,381,578.88
  5. Step 5: Solve for x
    x = 11,622,381,578.88/89,964.80
  6. Step 6: Final answer
    x = 129,188.10

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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.