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Finding the Fourth Proportional to 66,418.74, 99,613.44 and 19,655.82

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Solution

The fourth proportional to 66,418.74, 99,613.44 and 19,655.82 is: 29,479.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.74 : 99,613.44 = 19,655.82 : x
  2. Step 2: Convert to fraction form
    66,418.74/99,613.44 = 19,655.82/x
  3. Step 3: Cross multiply
    66,418.74x = 99,613.44 × 19,655.82
  4. Step 4: Simplify right side
    66,418.74x = 1,957,983,846.22
  5. Step 5: Solve for x
    x = 1,957,983,846.22/66,418.74
  6. Step 6: Final answer
    x = 29,479.39

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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.