Home / 86,626.10-129,939.15-81,377.30

Finding the Fourth Proportional to 86,626.10, 129,939.15 and 81,377.30

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Solution

The fourth proportional to 86,626.10, 129,939.15 and 81,377.30 is: 122,065.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,626.10 : 129,939.15 = 81,377.30 : x
  2. Step 2: Convert to fraction form
    86,626.10/129,939.15 = 81,377.30/x
  3. Step 3: Cross multiply
    86,626.10x = 129,939.15 × 81,377.30
  4. Step 4: Simplify right side
    86,626.10x = 10,574,097,191.30
  5. Step 5: Solve for x
    x = 10,574,097,191.30/86,626.10
  6. Step 6: Final answer
    x = 122,065.95

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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.