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Finding the Fourth Proportional to 127,554.80, 191,332.20 and 80,860.40

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Solution

The fourth proportional to 127,554.80, 191,332.20 and 80,860.40 is: 121,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,554.80 : 191,332.20 = 80,860.40 : x
  2. Step 2: Convert to fraction form
    127,554.80/191,332.20 = 80,860.40/x
  3. Step 3: Cross multiply
    127,554.80x = 191,332.20 × 80,860.40
  4. Step 4: Simplify right side
    127,554.80x = 15,471,198,224.88
  5. Step 5: Solve for x
    x = 15,471,198,224.88/127,554.80
  6. Step 6: Final answer
    x = 121,290.60

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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.