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Finding the Fourth Proportional to 71,233.84, 106,856.92 and 18,643.28

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Solution

The fourth proportional to 71,233.84, 106,856.92 and 18,643.28 is: 27,966.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,233.84 : 106,856.92 = 18,643.28 : x
  2. Step 2: Convert to fraction form
    71,233.84/106,856.92 = 18,643.28/x
  3. Step 3: Cross multiply
    71,233.84x = 106,856.92 × 18,643.28
  4. Step 4: Simplify right side
    71,233.84x = 1,992,163,479.50
  5. Step 5: Solve for x
    x = 1,992,163,479.50/71,233.84
  6. Step 6: Final answer
    x = 27,966.53

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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.