Home / 86,921.60-130,540.80-76,035.20

Finding the Fourth Proportional to 86,921.60, 130,540.80 and 76,035.20

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Solution

The fourth proportional to 86,921.60, 130,540.80 and 76,035.20 is: 114,191.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,921.60 : 130,540.80 = 76,035.20 : x
  2. Step 2: Convert to fraction form
    86,921.60/130,540.80 = 76,035.20/x
  3. Step 3: Cross multiply
    86,921.60x = 130,540.80 × 76,035.20
  4. Step 4: Simplify right side
    86,921.60x = 9,925,695,836.16
  5. Step 5: Solve for x
    x = 9,925,695,836.16/86,921.60
  6. Step 6: Final answer
    x = 114,191.36

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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.