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Finding the Fourth Proportional to 91,786.14, 137,383.70 and 47,351.70

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Solution

The fourth proportional to 91,786.14, 137,383.70 and 47,351.70 is: 70,875.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,786.14 : 137,383.70 = 47,351.70 : x
  2. Step 2: Convert to fraction form
    91,786.14/137,383.70 = 47,351.70/x
  3. Step 3: Cross multiply
    91,786.14x = 137,383.70 × 47,351.70
  4. Step 4: Simplify right side
    91,786.14x = 6,505,351,510.53
  5. Step 5: Solve for x
    x = 6,505,351,510.53/91,786.14
  6. Step 6: Final answer
    x = 70,875.10

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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.