Home / 81,412.24-122,132.20-28,089.76

Finding the Fourth Proportional to 81,412.24, 122,132.20 and 28,089.76

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Solution

The fourth proportional to 81,412.24, 122,132.20 and 28,089.76 is: 42,139.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,412.24 : 122,132.20 = 28,089.76 : x
  2. Step 2: Convert to fraction form
    81,412.24/122,132.20 = 28,089.76/x
  3. Step 3: Cross multiply
    81,412.24x = 122,132.20 × 28,089.76
  4. Step 4: Simplify right side
    81,412.24x = 3,430,664,186.27
  5. Step 5: Solve for x
    x = 3,430,664,186.27/81,412.24
  6. Step 6: Final answer
    x = 42,139.42

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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.