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Finding the Fourth Proportional to 101,107.91, 139,573.67 and 65,315.36

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Solution

The fourth proportional to 101,107.91, 139,573.67 and 65,315.36 is: 90,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,107.91 : 139,573.67 = 65,315.36 : x
  2. Step 2: Convert to fraction form
    101,107.91/139,573.67 = 65,315.36/x
  3. Step 3: Cross multiply
    101,107.91x = 139,573.67 × 65,315.36
  4. Step 4: Simplify right side
    101,107.91x = 9,116,304,524.93
  5. Step 5: Solve for x
    x = 9,116,304,524.93/101,107.91
  6. Step 6: Final answer
    x = 90,164.11

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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.