Home / 81,381.60-122,072.40-53,479.13

Finding the Fourth Proportional to 81,381.60, 122,072.40 and 53,479.13

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Solution

The fourth proportional to 81,381.60, 122,072.40 and 53,479.13 is: 80,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.60 : 122,072.40 = 53,479.13 : x
  2. Step 2: Convert to fraction form
    81,381.60/122,072.40 = 53,479.13/x
  3. Step 3: Cross multiply
    81,381.60x = 122,072.40 × 53,479.13
  4. Step 4: Simplify right side
    81,381.60x = 6,528,325,138.65
  5. Step 5: Solve for x
    x = 6,528,325,138.65/81,381.60
  6. Step 6: Final answer
    x = 80,218.69

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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.