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Finding the Fourth Proportional to 70,272, 96,975.36 and 40,463.36

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Solution

The fourth proportional to 70,272, 96,975.36 and 40,463.36 is: 55,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,272 : 96,975.36 = 40,463.36 : x
  2. Step 2: Convert to fraction form
    70,272/96,975.36 = 40,463.36/x
  3. Step 3: Cross multiply
    70,272x = 96,975.36 × 40,463.36
  4. Step 4: Simplify right side
    70,272x = 3,923,948,902.81
  5. Step 5: Solve for x
    x = 3,923,948,902.81/70,272
  6. Step 6: Final answer
    x = 55,839.44

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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.