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Finding the Fourth Proportional to 48,682.80, 72,878.40 and 28,951.20

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Solution

The fourth proportional to 48,682.80, 72,878.40 and 28,951.20 is: 43,340.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,682.80 : 72,878.40 = 28,951.20 : x
  2. Step 2: Convert to fraction form
    48,682.80/72,878.40 = 28,951.20/x
  3. Step 3: Cross multiply
    48,682.80x = 72,878.40 × 28,951.20
  4. Step 4: Simplify right side
    48,682.80x = 2,109,917,134.08
  5. Step 5: Solve for x
    x = 2,109,917,134.08/48,682.80
  6. Step 6: Final answer
    x = 43,340.09

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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.