Home / 121,436.20-182,154.30-87,999.40

Finding the Fourth Proportional to 121,436.20, 182,154.30 and 87,999.40

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Solution

The fourth proportional to 121,436.20, 182,154.30 and 87,999.40 is: 131,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,436.20 : 182,154.30 = 87,999.40 : x
  2. Step 2: Convert to fraction form
    121,436.20/182,154.30 = 87,999.40/x
  3. Step 3: Cross multiply
    121,436.20x = 182,154.30 × 87,999.40
  4. Step 4: Simplify right side
    121,436.20x = 16,029,469,107.42
  5. Step 5: Solve for x
    x = 16,029,469,107.42/121,436.20
  6. Step 6: Final answer
    x = 131,999.10

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1.5x scale

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.