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Finding the Fourth Proportional to 84,812.70, 127,219.05 and 71,690.70

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Solution

The fourth proportional to 84,812.70, 127,219.05 and 71,690.70 is: 107,536.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,812.70 : 127,219.05 = 71,690.70 : x
  2. Step 2: Convert to fraction form
    84,812.70/127,219.05 = 71,690.70/x
  3. Step 3: Cross multiply
    84,812.70x = 127,219.05 × 71,690.70
  4. Step 4: Simplify right side
    84,812.70x = 9,120,422,747.84
  5. Step 5: Solve for x
    x = 9,120,422,747.84/84,812.70
  6. Step 6: Final answer
    x = 107,536.05

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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.