Home / 121,425.20-181,943.40-76,972.40

Finding the Fourth Proportional to 121,425.20, 181,943.40 and 76,972.40

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Solution

The fourth proportional to 121,425.20, 181,943.40 and 76,972.40 is: 115,335.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,425.20 : 181,943.40 = 76,972.40 : x
  2. Step 2: Convert to fraction form
    121,425.20/181,943.40 = 76,972.40/x
  3. Step 3: Cross multiply
    121,425.20x = 181,943.40 × 76,972.40
  4. Step 4: Simplify right side
    121,425.20x = 14,004,620,162.16
  5. Step 5: Solve for x
    x = 14,004,620,162.16/121,425.20
  6. Step 6: Final answer
    x = 115,335.37

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1.5x scale

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.