Home / 81,221.60-121,809.04-31,297.76

Finding the Fourth Proportional to 81,221.60, 121,809.04 and 31,297.76

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Solution

The fourth proportional to 81,221.60, 121,809.04 and 31,297.76 is: 46,937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,221.60 : 121,809.04 = 31,297.76 : x
  2. Step 2: Convert to fraction form
    81,221.60/121,809.04 = 31,297.76/x
  3. Step 3: Cross multiply
    81,221.60x = 121,809.04 × 31,297.76
  4. Step 4: Simplify right side
    81,221.60x = 3,812,350,099.75
  5. Step 5: Solve for x
    x = 3,812,350,099.75/81,221.60
  6. Step 6: Final answer
    x = 46,937.64

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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.