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Finding the Fourth Proportional to 121,294.40, 182,101.80 and 103,638.13

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Solution

The fourth proportional to 121,294.40, 182,101.80 and 103,638.13 is: 155,594.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,294.40 : 182,101.80 = 103,638.13 : x
  2. Step 2: Convert to fraction form
    121,294.40/182,101.80 = 103,638.13/x
  3. Step 3: Cross multiply
    121,294.40x = 182,101.80 × 103,638.13
  4. Step 4: Simplify right side
    121,294.40x = 18,872,690,021.63
  5. Step 5: Solve for x
    x = 18,872,690,021.63/121,294.40
  6. Step 6: Final answer
    x = 155,594.08

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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.