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Finding the Fourth Proportional to 121,248.60, 181,872.90 and 74,009.40

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Solution

The fourth proportional to 121,248.60, 181,872.90 and 74,009.40 is: 111,014.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,248.60 : 181,872.90 = 74,009.40 : x
  2. Step 2: Convert to fraction form
    121,248.60/181,872.90 = 74,009.40/x
  3. Step 3: Cross multiply
    121,248.60x = 181,872.90 × 74,009.40
  4. Step 4: Simplify right side
    121,248.60x = 13,460,304,205.26
  5. Step 5: Solve for x
    x = 13,460,304,205.26/121,248.60
  6. Step 6: Final answer
    x = 111,014.10

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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.