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Finding the Fourth Proportional to 129,880.80, 179,318.88 and 106,064.64

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Solution

The fourth proportional to 129,880.80, 179,318.88 and 106,064.64 is: 146,437.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,880.80 : 179,318.88 = 106,064.64 : x
  2. Step 2: Convert to fraction form
    129,880.80/179,318.88 = 106,064.64/x
  3. Step 3: Cross multiply
    129,880.80x = 179,318.88 × 106,064.64
  4. Step 4: Simplify right side
    129,880.80x = 19,019,392,452.40
  5. Step 5: Solve for x
    x = 19,019,392,452.40/129,880.80
  6. Step 6: Final answer
    x = 146,437.29

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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.