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Finding the Fourth Proportional to 80,896.80, 121,345.20 and 51,445.20

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Solution

The fourth proportional to 80,896.80, 121,345.20 and 51,445.20 is: 77,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,896.80 : 121,345.20 = 51,445.20 : x
  2. Step 2: Convert to fraction form
    80,896.80/121,345.20 = 51,445.20/x
  3. Step 3: Cross multiply
    80,896.80x = 121,345.20 × 51,445.20
  4. Step 4: Simplify right side
    80,896.80x = 6,242,628,083.04
  5. Step 5: Solve for x
    x = 6,242,628,083.04/80,896.80
  6. Step 6: Final answer
    x = 77,167.80

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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.