Home / 86,585.10-129,877.65-47,121.90

Finding the Fourth Proportional to 86,585.10, 129,877.65 and 47,121.90

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Solution

The fourth proportional to 86,585.10, 129,877.65 and 47,121.90 is: 70,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,585.10 : 129,877.65 = 47,121.90 : x
  2. Step 2: Convert to fraction form
    86,585.10/129,877.65 = 47,121.90/x
  3. Step 3: Cross multiply
    86,585.10x = 129,877.65 × 47,121.90
  4. Step 4: Simplify right side
    86,585.10x = 6,120,081,635.54
  5. Step 5: Solve for x
    x = 6,120,081,635.54/86,585.10
  6. Step 6: Final answer
    x = 70,682.85

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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.