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Finding the Fourth Proportional to 70,344.78, 105,517.17 and 21,096.78

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Solution

The fourth proportional to 70,344.78, 105,517.17 and 21,096.78 is: 31,645.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,344.78 : 105,517.17 = 21,096.78 : x
  2. Step 2: Convert to fraction form
    70,344.78/105,517.17 = 21,096.78/x
  3. Step 3: Cross multiply
    70,344.78x = 105,517.17 × 21,096.78
  4. Step 4: Simplify right side
    70,344.78x = 2,226,072,521.71
  5. Step 5: Solve for x
    x = 2,226,072,521.71/70,344.78
  6. Step 6: Final answer
    x = 31,645.17

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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.