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Finding the Fourth Proportional to 86,712.39, 119,660.58 and 48,472

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Solution

The fourth proportional to 86,712.39, 119,660.58 and 48,472 is: 66,889.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,712.39 : 119,660.58 = 48,472 : x
  2. Step 2: Convert to fraction form
    86,712.39/119,660.58 = 48,472/x
  3. Step 3: Cross multiply
    86,712.39x = 119,660.58 × 48,472
  4. Step 4: Simplify right side
    86,712.39x = 5,800,187,633.76
  5. Step 5: Solve for x
    x = 5,800,187,633.76/86,712.39
  6. Step 6: Final answer
    x = 66,889.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.