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Finding the Fourth Proportional to 100,960.62, 139,304.79 and 69,117.90

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Solution

The fourth proportional to 100,960.62, 139,304.79 and 69,117.90 is: 95,368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,960.62 : 139,304.79 = 69,117.90 : x
  2. Step 2: Convert to fraction form
    100,960.62/139,304.79 = 69,117.90/x
  3. Step 3: Cross multiply
    100,960.62x = 139,304.79 × 69,117.90
  4. Step 4: Simplify right side
    100,960.62x = 9,628,454,544.74
  5. Step 5: Solve for x
    x = 9,628,454,544.74/100,960.62
  6. Step 6: Final answer
    x = 95,368.42

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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.