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Finding the Fourth Proportional to 70,299.37, 105,449.05 and 17,712.95

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Solution

The fourth proportional to 70,299.37, 105,449.05 and 17,712.95 is: 26,569.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,299.37 : 105,449.05 = 17,712.95 : x
  2. Step 2: Convert to fraction form
    70,299.37/105,449.05 = 17,712.95/x
  3. Step 3: Cross multiply
    70,299.37x = 105,449.05 × 17,712.95
  4. Step 4: Simplify right side
    70,299.37x = 1,867,813,750.20
  5. Step 5: Solve for x
    x = 1,867,813,750.20/70,299.37
  6. Step 6: Final answer
    x = 26,569.42

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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.