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Finding the Fourth Proportional to 131,357, 181,272.87 and 74,768.38

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Solution

The fourth proportional to 131,357, 181,272.87 and 74,768.38 is: 103,180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,357 : 181,272.87 = 74,768.38 : x
  2. Step 2: Convert to fraction form
    131,357/181,272.87 = 74,768.38/x
  3. Step 3: Cross multiply
    131,357x = 181,272.87 × 74,768.38
  4. Step 4: Simplify right side
    131,357x = 13,553,477,921.49
  5. Step 5: Solve for x
    x = 13,553,477,921.49/131,357
  6. Step 6: Final answer
    x = 103,180.48

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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.