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Finding the Fourth Proportional to 121,445.20, 181,876.20 and 98,117.20

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Solution

The fourth proportional to 121,445.20, 181,876.20 and 98,117.20 is: 146,940.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,445.20 : 181,876.20 = 98,117.20 : x
  2. Step 2: Convert to fraction form
    121,445.20/181,876.20 = 98,117.20/x
  3. Step 3: Cross multiply
    121,445.20x = 181,876.20 × 98,117.20
  4. Step 4: Simplify right side
    121,445.20x = 17,845,183,490.64
  5. Step 5: Solve for x
    x = 17,845,183,490.64/121,445.20
  6. Step 6: Final answer
    x = 146,940.21

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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.