Home / 86,921.40-130,382.10-75,516.60

Finding the Fourth Proportional to 86,921.40, 130,382.10 and 75,516.60

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Solution

The fourth proportional to 86,921.40, 130,382.10 and 75,516.60 is: 113,274.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,921.40 : 130,382.10 = 75,516.60 : x
  2. Step 2: Convert to fraction form
    86,921.40/130,382.10 = 75,516.60/x
  3. Step 3: Cross multiply
    86,921.40x = 130,382.10 × 75,516.60
  4. Step 4: Simplify right side
    86,921.40x = 9,846,012,892.86
  5. Step 5: Solve for x
    x = 9,846,012,892.86/86,921.40
  6. Step 6: Final answer
    x = 113,274.90

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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.