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Finding the Fourth Proportional to 81,069.84, 121,522.14 and 45,935.28

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Solution

The fourth proportional to 81,069.84, 121,522.14 and 45,935.28 is: 68,856.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069.84 : 121,522.14 = 45,935.28 : x
  2. Step 2: Convert to fraction form
    81,069.84/121,522.14 = 45,935.28/x
  3. Step 3: Cross multiply
    81,069.84x = 121,522.14 × 45,935.28
  4. Step 4: Simplify right side
    81,069.84x = 5,582,153,527.10
  5. Step 5: Solve for x
    x = 5,582,153,527.10/81,069.84
  6. Step 6: Final answer
    x = 68,856.11

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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.