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Finding the Fourth Proportional to 74,772.88, 112,143.48 and 28,029.20

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Solution

The fourth proportional to 74,772.88, 112,143.48 and 28,029.20 is: 42,037.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,772.88 : 112,143.48 = 28,029.20 : x
  2. Step 2: Convert to fraction form
    74,772.88/112,143.48 = 28,029.20/x
  3. Step 3: Cross multiply
    74,772.88x = 112,143.48 × 28,029.20
  4. Step 4: Simplify right side
    74,772.88x = 3,143,292,029.62
  5. Step 5: Solve for x
    x = 3,143,292,029.62/74,772.88
  6. Step 6: Final answer
    x = 42,037.86

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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.