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Finding the Fourth Proportional to 121,132.40, 181,479.90 and 113,259.20

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Solution

The fourth proportional to 121,132.40, 181,479.90 and 113,259.20 is: 169,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,132.40 : 181,479.90 = 113,259.20 : x
  2. Step 2: Convert to fraction form
    121,132.40/181,479.90 = 113,259.20/x
  3. Step 3: Cross multiply
    121,132.40x = 181,479.90 × 113,259.20
  4. Step 4: Simplify right side
    121,132.40x = 20,554,268,290.08
  5. Step 5: Solve for x
    x = 20,554,268,290.08/121,132.40
  6. Step 6: Final answer
    x = 169,684.31

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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.