Home / 83,511.50-115,182.26-71,889.40

Finding the Fourth Proportional to 83,511.50, 115,182.26 and 71,889.40

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Solution

The fourth proportional to 83,511.50, 115,182.26 and 71,889.40 is: 99,152.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,511.50 : 115,182.26 = 71,889.40 : x
  2. Step 2: Convert to fraction form
    83,511.50/115,182.26 = 71,889.40/x
  3. Step 3: Cross multiply
    83,511.50x = 115,182.26 × 71,889.40
  4. Step 4: Simplify right side
    83,511.50x = 8,280,383,562.04
  5. Step 5: Solve for x
    x = 8,280,383,562.04/83,511.50
  6. Step 6: Final answer
    x = 99,152.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.