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Finding the Fourth Proportional to 121,016.60, 181,481.70 and 42,133.40

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Solution

The fourth proportional to 121,016.60, 181,481.70 and 42,133.40 is: 63,185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,016.60 : 181,481.70 = 42,133.40 : x
  2. Step 2: Convert to fraction form
    121,016.60/181,481.70 = 42,133.40/x
  3. Step 3: Cross multiply
    121,016.60x = 181,481.70 × 42,133.40
  4. Step 4: Simplify right side
    121,016.60x = 7,646,441,058.78
  5. Step 5: Solve for x
    x = 7,646,441,058.78/121,016.60
  6. Step 6: Final answer
    x = 63,185.06

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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.