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Finding the Fourth Proportional to 71,809.17, 107,713.71 and 19,217.28

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Solution

The fourth proportional to 71,809.17, 107,713.71 and 19,217.28 is: 28,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,809.17 : 107,713.71 = 19,217.28 : x
  2. Step 2: Convert to fraction form
    71,809.17/107,713.71 = 19,217.28/x
  3. Step 3: Cross multiply
    71,809.17x = 107,713.71 × 19,217.28
  4. Step 4: Simplify right side
    71,809.17x = 2,069,964,524.91
  5. Step 5: Solve for x
    x = 2,069,964,524.91/71,809.17
  6. Step 6: Final answer
    x = 28,825.91

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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.