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Finding the Fourth Proportional to 127,547.80, 191,321.70 and 80,853.40

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Solution

The fourth proportional to 127,547.80, 191,321.70 and 80,853.40 is: 121,280.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,547.80 : 191,321.70 = 80,853.40 : x
  2. Step 2: Convert to fraction form
    127,547.80/191,321.70 = 80,853.40/x
  3. Step 3: Cross multiply
    127,547.80x = 191,321.70 × 80,853.40
  4. Step 4: Simplify right side
    127,547.80x = 15,469,009,938.78
  5. Step 5: Solve for x
    x = 15,469,009,938.78/127,547.80
  6. Step 6: Final answer
    x = 121,280.10

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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.