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Finding the Fourth Proportional to 75,129.62, 103,683.84 and 43,300.55

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Solution

The fourth proportional to 75,129.62, 103,683.84 and 43,300.55 is: 59,757.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,129.62 : 103,683.84 = 43,300.55 : x
  2. Step 2: Convert to fraction form
    75,129.62/103,683.84 = 43,300.55/x
  3. Step 3: Cross multiply
    75,129.62x = 103,683.84 × 43,300.55
  4. Step 4: Simplify right side
    75,129.62x = 4,489,567,298.11
  5. Step 5: Solve for x
    x = 4,489,567,298.11/75,129.62
  6. Step 6: Final answer
    x = 59,757.62

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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.