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Finding the Fourth Proportional to 91,940.40, 137,907.86 and 25,384.59

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Solution

The fourth proportional to 91,940.40, 137,907.86 and 25,384.59 is: 38,076.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,940.40 : 137,907.86 = 25,384.59 : x
  2. Step 2: Convert to fraction form
    91,940.40/137,907.86 = 25,384.59/x
  3. Step 3: Cross multiply
    91,940.40x = 137,907.86 × 25,384.59
  4. Step 4: Simplify right side
    91,940.40x = 3,500,734,356.95
  5. Step 5: Solve for x
    x = 3,500,734,356.95/91,940.40
  6. Step 6: Final answer
    x = 38,076.13

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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.