Home / 78,680.80-108,717.60-62,895.52

Finding the Fourth Proportional to 78,680.80, 108,717.60 and 62,895.52

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Solution

The fourth proportional to 78,680.80, 108,717.60 and 62,895.52 is: 86,906.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,680.80 : 108,717.60 = 62,895.52 : x
  2. Step 2: Convert to fraction form
    78,680.80/108,717.60 = 62,895.52/x
  3. Step 3: Cross multiply
    78,680.80x = 108,717.60 × 62,895.52
  4. Step 4: Simplify right side
    78,680.80x = 6,837,849,985.15
  5. Step 5: Solve for x
    x = 6,837,849,985.15/78,680.80
  6. Step 6: Final answer
    x = 86,906.21

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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.