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Finding the Fourth Proportional to 71,819.17, 107,728.53 and 19,228.66

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Solution

The fourth proportional to 71,819.17, 107,728.53 and 19,228.66 is: 28,842.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,819.17 : 107,728.53 = 19,228.66 : x
  2. Step 2: Convert to fraction form
    71,819.17/107,728.53 = 19,228.66/x
  3. Step 3: Cross multiply
    71,819.17x = 107,728.53 × 19,228.66
  4. Step 4: Simplify right side
    71,819.17x = 2,071,475,275.67
  5. Step 5: Solve for x
    x = 2,071,475,275.67/71,819.17
  6. Step 6: Final answer
    x = 28,842.93

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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.