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Finding the Fourth Proportional to 111,072.30, 166,617.92 and 39,018.91

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Solution

The fourth proportional to 111,072.30, 166,617.92 and 39,018.91 is: 58,531.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,072.30 : 166,617.92 = 39,018.91 : x
  2. Step 2: Convert to fraction form
    111,072.30/166,617.92 = 39,018.91/x
  3. Step 3: Cross multiply
    111,072.30x = 166,617.92 × 39,018.91
  4. Step 4: Simplify right side
    111,072.30x = 6,501,249,595.20
  5. Step 5: Solve for x
    x = 6,501,249,595.20/111,072.30
  6. Step 6: Final answer
    x = 58,531.69

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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.