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Finding the Fourth Proportional to 70,549.62, 105,685.97 and 40,905.15

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Solution

The fourth proportional to 70,549.62, 105,685.97 and 40,905.15 is: 61,277.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,549.62 : 105,685.97 = 40,905.15 : x
  2. Step 2: Convert to fraction form
    70,549.62/105,685.97 = 40,905.15/x
  3. Step 3: Cross multiply
    70,549.62x = 105,685.97 × 40,905.15
  4. Step 4: Simplify right side
    70,549.62x = 4,323,100,251.22
  5. Step 5: Solve for x
    x = 4,323,100,251.22/70,549.62
  6. Step 6: Final answer
    x = 61,277.44

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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.