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Finding the Fourth Proportional to 121,482.40, 182,144.40 and 109,040.80

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Solution

The fourth proportional to 121,482.40, 182,144.40 and 109,040.80 is: 163,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,482.40 : 182,144.40 = 109,040.80 : x
  2. Step 2: Convert to fraction form
    121,482.40/182,144.40 = 109,040.80/x
  3. Step 3: Cross multiply
    121,482.40x = 182,144.40 × 109,040.80
  4. Step 4: Simplify right side
    121,482.40x = 19,861,171,091.52
  5. Step 5: Solve for x
    x = 19,861,171,091.52/121,482.40
  6. Step 6: Final answer
    x = 163,490.11

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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.