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Finding the Fourth Proportional to 121,969.20, 182,662.20 and 98,641.20

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Solution

The fourth proportional to 121,969.20, 182,662.20 and 98,641.20 is: 147,725.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,969.20 : 182,662.20 = 98,641.20 : x
  2. Step 2: Convert to fraction form
    121,969.20/182,662.20 = 98,641.20/x
  3. Step 3: Cross multiply
    121,969.20x = 182,662.20 × 98,641.20
  4. Step 4: Simplify right side
    121,969.20x = 18,018,018,602.64
  5. Step 5: Solve for x
    x = 18,018,018,602.64/121,969.20
  6. Step 6: Final answer
    x = 147,725.97

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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.