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Finding the Fourth Proportional to 70,781.27, 97,678.50 and 40,568.39

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Solution

The fourth proportional to 70,781.27, 97,678.50 and 40,568.39 is: 55,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,781.27 : 97,678.50 = 40,568.39 : x
  2. Step 2: Convert to fraction form
    70,781.27/97,678.50 = 40,568.39/x
  3. Step 3: Cross multiply
    70,781.27x = 97,678.50 × 40,568.39
  4. Step 4: Simplify right side
    70,781.27x = 3,962,659,482.62
  5. Step 5: Solve for x
    x = 3,962,659,482.62/70,781.27
  6. Step 6: Final answer
    x = 55,984.58

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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.