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Finding the Fourth Proportional to 121,129.40, 181,621.20 and 62,080.40

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Solution

The fourth proportional to 121,129.40, 181,621.20 and 62,080.40 is: 93,083.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,129.40 : 181,621.20 = 62,080.40 : x
  2. Step 2: Convert to fraction form
    121,129.40/181,621.20 = 62,080.40/x
  3. Step 3: Cross multiply
    121,129.40x = 181,621.20 × 62,080.40
  4. Step 4: Simplify right side
    121,129.40x = 11,275,116,744.48
  5. Step 5: Solve for x
    x = 11,275,116,744.48/121,129.40
  6. Step 6: Final answer
    x = 93,083.24

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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.