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Finding the Fourth Proportional to 69,176.40, 103,699.80 and 54,175.20

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Solution

The fourth proportional to 69,176.40, 103,699.80 and 54,175.20 is: 81,212.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,176.40 : 103,699.80 = 54,175.20 : x
  2. Step 2: Convert to fraction form
    69,176.40/103,699.80 = 54,175.20/x
  3. Step 3: Cross multiply
    69,176.40x = 103,699.80 × 54,175.20
  4. Step 4: Simplify right side
    69,176.40x = 5,617,957,404.96
  5. Step 5: Solve for x
    x = 5,617,957,404.96/69,176.40
  6. Step 6: Final answer
    x = 81,212.05

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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.