Home / 85,380.45-117,920.17-66,487.50

Finding the Fourth Proportional to 85,380.45, 117,920.17 and 66,487.50

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Solution

The fourth proportional to 85,380.45, 117,920.17 and 66,487.50 is: 91,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380.45 : 117,920.17 = 66,487.50 : x
  2. Step 2: Convert to fraction form
    85,380.45/117,920.17 = 66,487.50/x
  3. Step 3: Cross multiply
    85,380.45x = 117,920.17 × 66,487.50
  4. Step 4: Simplify right side
    85,380.45x = 7,840,217,385.98
  5. Step 5: Solve for x
    x = 7,840,217,385.98/85,380.45
  6. Step 6: Final answer
    x = 91,826.85

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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.