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Finding the Fourth Proportional to 111,019.72, 153,197.95 and 62,618.98

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Solution

The fourth proportional to 111,019.72, 153,197.95 and 62,618.98 is: 86,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,019.72 : 153,197.95 = 62,618.98 : x
  2. Step 2: Convert to fraction form
    111,019.72/153,197.95 = 62,618.98/x
  3. Step 3: Cross multiply
    111,019.72x = 153,197.95 × 62,618.98
  4. Step 4: Simplify right side
    111,019.72x = 9,593,099,367.09
  5. Step 5: Solve for x
    x = 9,593,099,367.09/111,019.72
  6. Step 6: Final answer
    x = 86,408.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.