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Finding the Fourth Proportional to 84,912.60, 127,368.90 and 75,727.20

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Solution

The fourth proportional to 84,912.60, 127,368.90 and 75,727.20 is: 113,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,912.60 : 127,368.90 = 75,727.20 : x
  2. Step 2: Convert to fraction form
    84,912.60/127,368.90 = 75,727.20/x
  3. Step 3: Cross multiply
    84,912.60x = 127,368.90 × 75,727.20
  4. Step 4: Simplify right side
    84,912.60x = 9,645,290,164.08
  5. Step 5: Solve for x
    x = 9,645,290,164.08/84,912.60
  6. Step 6: Final answer
    x = 113,590.80

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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.