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Finding the Fourth Proportional to 66,505.52, 99,760.01 and 19,118.70

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Solution

The fourth proportional to 66,505.52, 99,760.01 and 19,118.70 is: 28,678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.52 : 99,760.01 = 19,118.70 : x
  2. Step 2: Convert to fraction form
    66,505.52/99,760.01 = 19,118.70/x
  3. Step 3: Cross multiply
    66,505.52x = 99,760.01 × 19,118.70
  4. Step 4: Simplify right side
    66,505.52x = 1,907,281,607.59
  5. Step 5: Solve for x
    x = 1,907,281,607.59/66,505.52
  6. Step 6: Final answer
    x = 28,678.54

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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.