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Finding the Fourth Proportional to 71,115.90, 106,673.84 and 21,194.70

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Solution

The fourth proportional to 71,115.90, 106,673.84 and 21,194.70 is: 31,792.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,115.90 : 106,673.84 = 21,194.70 : x
  2. Step 2: Convert to fraction form
    71,115.90/106,673.84 = 21,194.70/x
  3. Step 3: Cross multiply
    71,115.90x = 106,673.84 × 21,194.70
  4. Step 4: Simplify right side
    71,115.90x = 2,260,920,036.65
  5. Step 5: Solve for x
    x = 2,260,920,036.65/71,115.90
  6. Step 6: Final answer
    x = 31,792.05

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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.