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Finding the Fourth Proportional to 66,400.70, 99,618.65 and 28,944.70

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Solution

The fourth proportional to 66,400.70, 99,618.65 and 28,944.70 is: 43,424.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.70 : 99,618.65 = 28,944.70 : x
  2. Step 2: Convert to fraction form
    66,400.70/99,618.65 = 28,944.70/x
  3. Step 3: Cross multiply
    66,400.70x = 99,618.65 × 28,944.70
  4. Step 4: Simplify right side
    66,400.70x = 2,883,431,938.66
  5. Step 5: Solve for x
    x = 2,883,431,938.66/66,400.70
  6. Step 6: Final answer
    x = 43,424.72

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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.