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Finding the Fourth Proportional to 66,206.88, 99,309.92 and 28,762.08

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Solution

The fourth proportional to 66,206.88, 99,309.92 and 28,762.08 is: 43,142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.88 : 99,309.92 = 28,762.08 : x
  2. Step 2: Convert to fraction form
    66,206.88/99,309.92 = 28,762.08/x
  3. Step 3: Cross multiply
    66,206.88x = 99,309.92 × 28,762.08
  4. Step 4: Simplify right side
    66,206.88x = 2,856,359,863.83
  5. Step 5: Solve for x
    x = 2,856,359,863.83/66,206.88
  6. Step 6: Final answer
    x = 43,142.95

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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.