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Finding the Fourth Proportional to 73,204.62, 100,988.87 and 42,989.40

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Solution

The fourth proportional to 73,204.62, 100,988.87 and 42,989.40 is: 59,305.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,204.62 : 100,988.87 = 42,989.40 : x
  2. Step 2: Convert to fraction form
    73,204.62/100,988.87 = 42,989.40/x
  3. Step 3: Cross multiply
    73,204.62x = 100,988.87 × 42,989.40
  4. Step 4: Simplify right side
    73,204.62x = 4,341,450,713.03
  5. Step 5: Solve for x
    x = 4,341,450,713.03/73,204.62
  6. Step 6: Final answer
    x = 59,305.69

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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.