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Finding the Fourth Proportional to 221,671.72, 332,640.06 and 81,444.52

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Solution

The fourth proportional to 221,671.72, 332,640.06 and 81,444.52 is: 122,215.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,671.72 : 332,640.06 = 81,444.52 : x
  2. Step 2: Convert to fraction form
    221,671.72/332,640.06 = 81,444.52/x
  3. Step 3: Cross multiply
    221,671.72x = 332,640.06 × 81,444.52
  4. Step 4: Simplify right side
    221,671.72x = 27,091,710,019.47
  5. Step 5: Solve for x
    x = 27,091,710,019.47/221,671.72
  6. Step 6: Final answer
    x = 122,215.45

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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.