Home / 81,432.12-122,106.90-28,834.20

Finding the Fourth Proportional to 81,432.12, 122,106.90 and 28,834.20

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Solution

The fourth proportional to 81,432.12, 122,106.90 and 28,834.20 is: 43,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432.12 : 122,106.90 = 28,834.20 : x
  2. Step 2: Convert to fraction form
    81,432.12/122,106.90 = 28,834.20/x
  3. Step 3: Cross multiply
    81,432.12x = 122,106.90 × 28,834.20
  4. Step 4: Simplify right side
    81,432.12x = 3,520,854,775.98
  5. Step 5: Solve for x
    x = 3,520,854,775.98/81,432.12
  6. Step 6: Final answer
    x = 43,236.68

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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.