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Finding the Fourth Proportional to 408,113.20, 612,169.80 and 127,716.40

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Solution

The fourth proportional to 408,113.20, 612,169.80 and 127,716.40 is: 191,574.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,113.20 : 612,169.80 = 127,716.40 : x
  2. Step 2: Convert to fraction form
    408,113.20/612,169.80 = 127,716.40/x
  3. Step 3: Cross multiply
    408,113.20x = 612,169.80 × 127,716.40
  4. Step 4: Simplify right side
    408,113.20x = 78,184,123,044.72
  5. Step 5: Solve for x
    x = 78,184,123,044.72/408,113.20
  6. Step 6: Final answer
    x = 191,574.60

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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.