Home / 112,823.60-169,235.40-81,330.80

Finding the Fourth Proportional to 112,823.60, 169,235.40 and 81,330.80

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Solution

The fourth proportional to 112,823.60, 169,235.40 and 81,330.80 is: 121,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,823.60 : 169,235.40 = 81,330.80 : x
  2. Step 2: Convert to fraction form
    112,823.60/169,235.40 = 81,330.80/x
  3. Step 3: Cross multiply
    112,823.60x = 169,235.40 × 81,330.80
  4. Step 4: Simplify right side
    112,823.60x = 13,764,050,470.32
  5. Step 5: Solve for x
    x = 13,764,050,470.32/112,823.60
  6. Step 6: Final answer
    x = 121,996.20

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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.