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Finding the Fourth Proportional to 135,653.76, 187,168.32 and 79,044.48

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Solution

The fourth proportional to 135,653.76, 187,168.32 and 79,044.48 is: 109,061.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,653.76 : 187,168.32 = 79,044.48 : x
  2. Step 2: Convert to fraction form
    135,653.76/187,168.32 = 79,044.48/x
  3. Step 3: Cross multiply
    135,653.76x = 187,168.32 × 79,044.48
  4. Step 4: Simplify right side
    135,653.76x = 14,794,622,526.87
  5. Step 5: Solve for x
    x = 14,794,622,526.87/135,653.76
  6. Step 6: Final answer
    x = 109,061.65

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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.