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Finding the Fourth Proportional to 137,420.20, 206,259.90 and 84,932.20

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Solution

The fourth proportional to 137,420.20, 206,259.90 and 84,932.20 is: 127,478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,420.20 : 206,259.90 = 84,932.20 : x
  2. Step 2: Convert to fraction form
    137,420.20/206,259.90 = 84,932.20/x
  3. Step 3: Cross multiply
    137,420.20x = 206,259.90 × 84,932.20
  4. Step 4: Simplify right side
    137,420.20x = 17,518,107,078.78
  5. Step 5: Solve for x
    x = 17,518,107,078.78/137,420.20
  6. Step 6: Final answer
    x = 127,478.40

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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.