Home / 121,139.90-181,750.33-53,662.78

Finding the Fourth Proportional to 121,139.90, 181,750.33 and 53,662.78

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Solution

The fourth proportional to 121,139.90, 181,750.33 and 53,662.78 is: 80,512.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,139.90 : 181,750.33 = 53,662.78 : x
  2. Step 2: Convert to fraction form
    121,139.90/181,750.33 = 53,662.78/x
  3. Step 3: Cross multiply
    121,139.90x = 181,750.33 × 53,662.78
  4. Step 4: Simplify right side
    121,139.90x = 9,753,227,973.72
  5. Step 5: Solve for x
    x = 9,753,227,973.72/121,139.90
  6. Step 6: Final answer
    x = 80,512.10

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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.