Home / 121,287.60-182,039.40-71,305.20

Finding the Fourth Proportional to 121,287.60, 182,039.40 and 71,305.20

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Solution

The fourth proportional to 121,287.60, 182,039.40 and 71,305.20 is: 107,021.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,287.60 : 182,039.40 = 71,305.20 : x
  2. Step 2: Convert to fraction form
    121,287.60/182,039.40 = 71,305.20/x
  3. Step 3: Cross multiply
    121,287.60x = 182,039.40 × 71,305.20
  4. Step 4: Simplify right side
    121,287.60x = 12,980,355,824.88
  5. Step 5: Solve for x
    x = 12,980,355,824.88/121,287.60
  6. Step 6: Final answer
    x = 107,021.29

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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.