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Finding the Fourth Proportional to 81,637.80, 122,456.70 and 34,895.40

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Solution

The fourth proportional to 81,637.80, 122,456.70 and 34,895.40 is: 52,343.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,637.80 : 122,456.70 = 34,895.40 : x
  2. Step 2: Convert to fraction form
    81,637.80/122,456.70 = 34,895.40/x
  3. Step 3: Cross multiply
    81,637.80x = 122,456.70 × 34,895.40
  4. Step 4: Simplify right side
    81,637.80x = 4,273,175,529.18
  5. Step 5: Solve for x
    x = 4,273,175,529.18/81,637.80
  6. Step 6: Final answer
    x = 52,343.10

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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.