Home / 121,425.60-182,138.40-79,435.20

Finding the Fourth Proportional to 121,425.60, 182,138.40 and 79,435.20

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Solution

The fourth proportional to 121,425.60, 182,138.40 and 79,435.20 is: 119,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,425.60 : 182,138.40 = 79,435.20 : x
  2. Step 2: Convert to fraction form
    121,425.60/182,138.40 = 79,435.20/x
  3. Step 3: Cross multiply
    121,425.60x = 182,138.40 × 79,435.20
  4. Step 4: Simplify right side
    121,425.60x = 14,468,200,231.68
  5. Step 5: Solve for x
    x = 14,468,200,231.68/121,425.60
  6. Step 6: Final answer
    x = 119,152.80

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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.