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Finding the Fourth Proportional to 81,574.49, 122,335.81 and 55,447.13

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Solution

The fourth proportional to 81,574.49, 122,335.81 and 55,447.13 is: 83,153.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,574.49 : 122,335.81 = 55,447.13 : x
  2. Step 2: Convert to fraction form
    81,574.49/122,335.81 = 55,447.13/x
  3. Step 3: Cross multiply
    81,574.49x = 122,335.81 × 55,447.13
  4. Step 4: Simplify right side
    81,574.49x = 6,783,169,560.73
  5. Step 5: Solve for x
    x = 6,783,169,560.73/81,574.49
  6. Step 6: Final answer
    x = 83,153.07

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1.5x scale

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.