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Finding the Fourth Proportional to 221,485, 305,572.72 and 124,673.28

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Solution

The fourth proportional to 221,485, 305,572.72 and 124,673.28 is: 172,006.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,485 : 305,572.72 = 124,673.28 : x
  2. Step 2: Convert to fraction form
    221,485/305,572.72 = 124,673.28/x
  3. Step 3: Cross multiply
    221,485x = 305,572.72 × 124,673.28
  4. Step 4: Simplify right side
    221,485x = 38,096,753,280.92
  5. Step 5: Solve for x
    x = 38,096,753,280.92/221,485
  6. Step 6: Final answer
    x = 172,006.02

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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.