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Finding the Fourth Proportional to 72,448.91, 108,661.06 and 19,141.47

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Solution

The fourth proportional to 72,448.91, 108,661.06 and 19,141.47 is: 28,708.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,448.91 : 108,661.06 = 19,141.47 : x
  2. Step 2: Convert to fraction form
    72,448.91/108,661.06 = 19,141.47/x
  3. Step 3: Cross multiply
    72,448.91x = 108,661.06 × 19,141.47
  4. Step 4: Simplify right side
    72,448.91x = 2,079,931,876.85
  5. Step 5: Solve for x
    x = 2,079,931,876.85/72,448.91
  6. Step 6: Final answer
    x = 28,708.95

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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.