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Finding the Fourth Proportional to 121,305.40, 181,958.10 and 83,251.60

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Solution

The fourth proportional to 121,305.40, 181,958.10 and 83,251.60 is: 124,877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,305.40 : 181,958.10 = 83,251.60 : x
  2. Step 2: Convert to fraction form
    121,305.40/181,958.10 = 83,251.60/x
  3. Step 3: Cross multiply
    121,305.40x = 181,958.10 × 83,251.60
  4. Step 4: Simplify right side
    121,305.40x = 15,148,302,957.96
  5. Step 5: Solve for x
    x = 15,148,302,957.96/121,305.40
  6. Step 6: Final answer
    x = 124,877.40

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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.