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Finding the Fourth Proportional to 66,439.71, 99,671.85 and 19,052.82

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Solution

The fourth proportional to 66,439.71, 99,671.85 and 19,052.82 is: 28,582.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439.71 : 99,671.85 = 19,052.82 : x
  2. Step 2: Convert to fraction form
    66,439.71/99,671.85 = 19,052.82/x
  3. Step 3: Cross multiply
    66,439.71x = 99,671.85 × 19,052.82
  4. Step 4: Simplify right side
    66,439.71x = 1,899,029,817.12
  5. Step 5: Solve for x
    x = 1,899,029,817.12/66,439.71
  6. Step 6: Final answer
    x = 28,582.75

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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.