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Finding the Fourth Proportional to 121,435.20, 181,861.20 and 98,107.20

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Solution

The fourth proportional to 121,435.20, 181,861.20 and 98,107.20 is: 146,925.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,435.20 : 181,861.20 = 98,107.20 : x
  2. Step 2: Convert to fraction form
    121,435.20/181,861.20 = 98,107.20/x
  3. Step 3: Cross multiply
    121,435.20x = 181,861.20 × 98,107.20
  4. Step 4: Simplify right side
    121,435.20x = 17,841,893,120.64
  5. Step 5: Solve for x
    x = 17,841,893,120.64/121,435.20
  6. Step 6: Final answer
    x = 146,925.22

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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.