Home / 81,789.39-122,685.30-53,888.13

Finding the Fourth Proportional to 81,789.39, 122,685.30 and 53,888.13

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Solution

The fourth proportional to 81,789.39, 122,685.30 and 53,888.13 is: 80,833.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.39 : 122,685.30 = 53,888.13 : x
  2. Step 2: Convert to fraction form
    81,789.39/122,685.30 = 53,888.13/x
  3. Step 3: Cross multiply
    81,789.39x = 122,685.30 × 53,888.13
  4. Step 4: Simplify right side
    81,789.39x = 6,611,281,395.49
  5. Step 5: Solve for x
    x = 6,611,281,395.49/81,789.39
  6. Step 6: Final answer
    x = 80,833.00

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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.