Home / 81,780.03-122,700.42-56,806.92

Finding the Fourth Proportional to 81,780.03, 122,700.42 and 56,806.92

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Solution

The fourth proportional to 81,780.03, 122,700.42 and 56,806.92 is: 85,231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.03 : 122,700.42 = 56,806.92 : x
  2. Step 2: Convert to fraction form
    81,780.03/122,700.42 = 56,806.92/x
  3. Step 3: Cross multiply
    81,780.03x = 122,700.42 × 56,806.92
  4. Step 4: Simplify right side
    81,780.03x = 6,970,232,942.91
  5. Step 5: Solve for x
    x = 6,970,232,942.91/81,780.03
  6. Step 6: Final answer
    x = 85,231.48

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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.