Home / 86,541.68-129,870.51-30,381.96

Finding the Fourth Proportional to 86,541.68, 129,870.51 and 30,381.96

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Solution

The fourth proportional to 86,541.68, 129,870.51 and 30,381.96 is: 45,593.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,541.68 : 129,870.51 = 30,381.96 : x
  2. Step 2: Convert to fraction form
    86,541.68/129,870.51 = 30,381.96/x
  3. Step 3: Cross multiply
    86,541.68x = 129,870.51 × 30,381.96
  4. Step 4: Simplify right side
    86,541.68x = 3,945,719,962.96
  5. Step 5: Solve for x
    x = 3,945,719,962.96/86,541.68
  6. Step 6: Final answer
    x = 45,593.29

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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.