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Finding the Fourth Proportional to 84,959.20, 127,438.80 and 73,149.40

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Solution

The fourth proportional to 84,959.20, 127,438.80 and 73,149.40 is: 109,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,959.20 : 127,438.80 = 73,149.40 : x
  2. Step 2: Convert to fraction form
    84,959.20/127,438.80 = 73,149.40/x
  3. Step 3: Cross multiply
    84,959.20x = 127,438.80 × 73,149.40
  4. Step 4: Simplify right side
    84,959.20x = 9,322,071,756.72
  5. Step 5: Solve for x
    x = 9,322,071,756.72/84,959.20
  6. Step 6: Final answer
    x = 109,724.10

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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.