Home / 78,680.90-108,547.14-54,821.41

Finding the Fourth Proportional to 78,680.90, 108,547.14 and 54,821.41

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Solution

The fourth proportional to 78,680.90, 108,547.14 and 54,821.41 is: 75,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,680.90 : 108,547.14 = 54,821.41 : x
  2. Step 2: Convert to fraction form
    78,680.90/108,547.14 = 54,821.41/x
  3. Step 3: Cross multiply
    78,680.90x = 108,547.14 × 54,821.41
  4. Step 4: Simplify right side
    78,680.90x = 5,950,707,502.69
  5. Step 5: Solve for x
    x = 5,950,707,502.69/78,680.90
  6. Step 6: Final answer
    x = 75,630.90

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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.