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Finding the Fourth Proportional to 66,206.80, 99,254.40 and 28,738.64

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Solution

The fourth proportional to 66,206.80, 99,254.40 and 28,738.64 is: 43,083.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.80 : 99,254.40 = 28,738.64 : x
  2. Step 2: Convert to fraction form
    66,206.80/99,254.40 = 28,738.64/x
  3. Step 3: Cross multiply
    66,206.80x = 99,254.40 × 28,738.64
  4. Step 4: Simplify right side
    66,206.80x = 2,852,436,470.02
  5. Step 5: Solve for x
    x = 2,852,436,470.02/66,206.80
  6. Step 6: Final answer
    x = 43,083.74

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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.