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Finding the Fourth Proportional to 73,266.20, 109,899.30 and 28,870.10

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Solution

The fourth proportional to 73,266.20, 109,899.30 and 28,870.10 is: 43,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,266.20 : 109,899.30 = 28,870.10 : x
  2. Step 2: Convert to fraction form
    73,266.20/109,899.30 = 28,870.10/x
  3. Step 3: Cross multiply
    73,266.20x = 109,899.30 × 28,870.10
  4. Step 4: Simplify right side
    73,266.20x = 3,172,803,780.93
  5. Step 5: Solve for x
    x = 3,172,803,780.93/73,266.20
  6. Step 6: Final answer
    x = 43,305.15

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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.