Home / 86,157.72-129,257.28-29,989.56

Finding the Fourth Proportional to 86,157.72, 129,257.28 and 29,989.56

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Solution

The fourth proportional to 86,157.72, 129,257.28 and 29,989.56 is: 44,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,157.72 : 129,257.28 = 29,989.56 : x
  2. Step 2: Convert to fraction form
    86,157.72/129,257.28 = 29,989.56/x
  3. Step 3: Cross multiply
    86,157.72x = 129,257.28 × 29,989.56
  4. Step 4: Simplify right side
    86,157.72x = 3,876,368,954.00
  5. Step 5: Solve for x
    x = 3,876,368,954.00/86,157.72
  6. Step 6: Final answer
    x = 44,991.55

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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.