Home / 83,869.41-115,720.79-61,220.75

Finding the Fourth Proportional to 83,869.41, 115,720.79 and 61,220.75

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Solution

The fourth proportional to 83,869.41, 115,720.79 and 61,220.75 is: 84,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,869.41 : 115,720.79 = 61,220.75 : x
  2. Step 2: Convert to fraction form
    83,869.41/115,720.79 = 61,220.75/x
  3. Step 3: Cross multiply
    83,869.41x = 115,720.79 × 61,220.75
  4. Step 4: Simplify right side
    83,869.41x = 7,084,513,554.39
  5. Step 5: Solve for x
    x = 7,084,513,554.39/83,869.41
  6. Step 6: Final answer
    x = 84,470.77

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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.