Home / 440,977.60-661,465.11-121,129.78

Finding the Fourth Proportional to 440,977.60, 661,465.11 and 121,129.78

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Solution

The fourth proportional to 440,977.60, 661,465.11 and 121,129.78 is: 181,694.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,977.60 : 661,465.11 = 121,129.78 : x
  2. Step 2: Convert to fraction form
    440,977.60/661,465.11 = 121,129.78/x
  3. Step 3: Cross multiply
    440,977.60x = 661,465.11 × 121,129.78
  4. Step 4: Simplify right side
    440,977.60x = 80,123,121,598.31
  5. Step 5: Solve for x
    x = 80,123,121,598.31/440,977.60
  6. Step 6: Final answer
    x = 181,694.31

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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.