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Finding the Fourth Proportional to 172,043.55, 258,149.85 and 77,340.63

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Solution

The fourth proportional to 172,043.55, 258,149.85 and 77,340.63 is: 116,048.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,043.55 : 258,149.85 = 77,340.63 : x
  2. Step 2: Convert to fraction form
    172,043.55/258,149.85 = 77,340.63/x
  3. Step 3: Cross multiply
    172,043.55x = 258,149.85 × 77,340.63
  4. Step 4: Simplify right side
    172,043.55x = 19,965,472,033.41
  5. Step 5: Solve for x
    x = 19,965,472,033.41/172,043.55
  6. Step 6: Final answer
    x = 116,048.94

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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.