Home / 80,156.16-120,370.86-66,815.46

Finding the Fourth Proportional to 80,156.16, 120,370.86 and 66,815.46

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Solution

The fourth proportional to 80,156.16, 120,370.86 and 66,815.46 is: 100,337.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,156.16 : 120,370.86 = 66,815.46 : x
  2. Step 2: Convert to fraction form
    80,156.16/120,370.86 = 66,815.46/x
  3. Step 3: Cross multiply
    80,156.16x = 120,370.86 × 66,815.46
  4. Step 4: Simplify right side
    80,156.16x = 8,042,634,381.50
  5. Step 5: Solve for x
    x = 8,042,634,381.50/80,156.16
  6. Step 6: Final answer
    x = 100,337.07

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1.5x scale

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.