Home / 86,358.15-129,528.72-30,187.89

Finding the Fourth Proportional to 86,358.15, 129,528.72 and 30,187.89

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Solution

The fourth proportional to 86,358.15, 129,528.72 and 30,187.89 is: 45,278.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,358.15 : 129,528.72 = 30,187.89 : x
  2. Step 2: Convert to fraction form
    86,358.15/129,528.72 = 30,187.89/x
  3. Step 3: Cross multiply
    86,358.15x = 129,528.72 × 30,187.89
  4. Step 4: Simplify right side
    86,358.15x = 3,910,198,751.20
  5. Step 5: Solve for x
    x = 3,910,198,751.20/86,358.15
  6. Step 6: Final answer
    x = 45,278.86

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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.