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Finding the Fourth Proportional to 66,453.93, 99,663.78 and 19,695.87

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Solution

The fourth proportional to 66,453.93, 99,663.78 and 19,695.87 is: 29,538.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,453.93 : 99,663.78 = 19,695.87 : x
  2. Step 2: Convert to fraction form
    66,453.93/99,663.78 = 19,695.87/x
  3. Step 3: Cross multiply
    66,453.93x = 99,663.78 × 19,695.87
  4. Step 4: Simplify right side
    66,453.93x = 1,962,964,854.59
  5. Step 5: Solve for x
    x = 1,962,964,854.59/66,453.93
  6. Step 6: Final answer
    x = 29,538.73

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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.