Home / 86,407.10-129,621.01-81,683.18

Finding the Fourth Proportional to 86,407.10, 129,621.01 and 81,683.18

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Solution

The fourth proportional to 86,407.10, 129,621.01 and 81,683.18 is: 122,534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,407.10 : 129,621.01 = 81,683.18 : x
  2. Step 2: Convert to fraction form
    86,407.10/129,621.01 = 81,683.18/x
  3. Step 3: Cross multiply
    86,407.10x = 129,621.01 × 81,683.18
  4. Step 4: Simplify right side
    86,407.10x = 10,587,856,291.61
  5. Step 5: Solve for x
    x = 10,587,856,291.61/86,407.10
  6. Step 6: Final answer
    x = 122,534.56

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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.