Home / 86,731.20-130,010.40-39,902.40

Finding the Fourth Proportional to 86,731.20, 130,010.40 and 39,902.40

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Solution

The fourth proportional to 86,731.20, 130,010.40 and 39,902.40 is: 59,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,731.20 : 130,010.40 = 39,902.40 : x
  2. Step 2: Convert to fraction form
    86,731.20/130,010.40 = 39,902.40/x
  3. Step 3: Cross multiply
    86,731.20x = 130,010.40 × 39,902.40
  4. Step 4: Simplify right side
    86,731.20x = 5,187,726,984.96
  5. Step 5: Solve for x
    x = 5,187,726,984.96/86,731.20
  6. Step 6: Final answer
    x = 59,813.85

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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.