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Finding the Fourth Proportional to 157,980.92, 236,761.79 and 69,137.69

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Solution

The fourth proportional to 157,980.92, 236,761.79 and 69,137.69 is: 103,614.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,980.92 : 236,761.79 = 69,137.69 : x
  2. Step 2: Convert to fraction form
    157,980.92/236,761.79 = 69,137.69/x
  3. Step 3: Cross multiply
    157,980.92x = 236,761.79 × 69,137.69
  4. Step 4: Simplify right side
    157,980.92x = 16,369,164,005.61
  5. Step 5: Solve for x
    x = 16,369,164,005.61/157,980.92
  6. Step 6: Final answer
    x = 103,614.81

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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.