Home / 121,441.20-181,943.10-74,639.40

Finding the Fourth Proportional to 121,441.20, 181,943.10 and 74,639.40

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Solution

The fourth proportional to 121,441.20, 181,943.10 and 74,639.40 is: 111,824.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,441.20 : 181,943.10 = 74,639.40 : x
  2. Step 2: Convert to fraction form
    121,441.20/181,943.10 = 74,639.40/x
  3. Step 3: Cross multiply
    121,441.20x = 181,943.10 × 74,639.40
  4. Step 4: Simplify right side
    121,441.20x = 13,580,123,818.14
  5. Step 5: Solve for x
    x = 13,580,123,818.14/121,441.20
  6. Step 6: Final answer
    x = 111,824.68

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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.