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Finding the Fourth Proportional to 121,172.40, 181,766.70 and 41,209.20

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Solution

The fourth proportional to 121,172.40, 181,766.70 and 41,209.20 is: 61,816.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,172.40 : 181,766.70 = 41,209.20 : x
  2. Step 2: Convert to fraction form
    121,172.40/181,766.70 = 41,209.20/x
  3. Step 3: Cross multiply
    121,172.40x = 181,766.70 × 41,209.20
  4. Step 4: Simplify right side
    121,172.40x = 7,490,460,293.64
  5. Step 5: Solve for x
    x = 7,490,460,293.64/121,172.40
  6. Step 6: Final answer
    x = 61,816.55

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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.