Home / 86,541.10-129,811.65-81,292.30

Finding the Fourth Proportional to 86,541.10, 129,811.65 and 81,292.30

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Solution

The fourth proportional to 86,541.10, 129,811.65 and 81,292.30 is: 121,938.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,541.10 : 129,811.65 = 81,292.30 : x
  2. Step 2: Convert to fraction form
    86,541.10/129,811.65 = 81,292.30/x
  3. Step 3: Cross multiply
    86,541.10x = 129,811.65 × 81,292.30
  4. Step 4: Simplify right side
    86,541.10x = 10,552,687,595.30
  5. Step 5: Solve for x
    x = 10,552,687,595.30/86,541.10
  6. Step 6: Final answer
    x = 121,938.45

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Similar ratio
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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.