Home / 121,081.20-181,403.10-74,279.40

Finding the Fourth Proportional to 121,081.20, 181,403.10 and 74,279.40

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Solution

The fourth proportional to 121,081.20, 181,403.10 and 74,279.40 is: 111,284.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,081.20 : 181,403.10 = 74,279.40 : x
  2. Step 2: Convert to fraction form
    121,081.20/181,403.10 = 74,279.40/x
  3. Step 3: Cross multiply
    121,081.20x = 181,403.10 × 74,279.40
  4. Step 4: Simplify right side
    121,081.20x = 13,474,513,426.14
  5. Step 5: Solve for x
    x = 13,474,513,426.14/121,081.20
  6. Step 6: Final answer
    x = 111,284.93

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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.