Home / 86,768.20-130,065.90-39,939.40

Finding the Fourth Proportional to 86,768.20, 130,065.90 and 39,939.40

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Solution

The fourth proportional to 86,768.20, 130,065.90 and 39,939.40 is: 59,869.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,768.20 : 130,065.90 = 39,939.40 : x
  2. Step 2: Convert to fraction form
    86,768.20/130,065.90 = 39,939.40/x
  3. Step 3: Cross multiply
    86,768.20x = 130,065.90 × 39,939.40
  4. Step 4: Simplify right side
    86,768.20x = 5,194,754,006.46
  5. Step 5: Solve for x
    x = 5,194,754,006.46/86,768.20
  6. Step 6: Final answer
    x = 59,869.33

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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.