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Finding the Fourth Proportional to 66,199.59, 99,288.92 and 28,749.62

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Solution

The fourth proportional to 66,199.59, 99,288.92 and 28,749.62 is: 43,119.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,199.59 : 99,288.92 = 28,749.62 : x
  2. Step 2: Convert to fraction form
    66,199.59/99,288.92 = 28,749.62/x
  3. Step 3: Cross multiply
    66,199.59x = 99,288.92 × 28,749.62
  4. Step 4: Simplify right side
    66,199.59x = 2,854,518,080.02
  5. Step 5: Solve for x
    x = 2,854,518,080.02/66,199.59
  6. Step 6: Final answer
    x = 43,119.88

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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.