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Finding the Fourth Proportional to 143,630.10, 215,479.26 and 72,377.64

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Solution

The fourth proportional to 143,630.10, 215,479.26 and 72,377.64 is: 108,583.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,630.10 : 215,479.26 = 72,377.64 : x
  2. Step 2: Convert to fraction form
    143,630.10/215,479.26 = 72,377.64/x
  3. Step 3: Cross multiply
    143,630.10x = 215,479.26 × 72,377.64
  4. Step 4: Simplify right side
    143,630.10x = 15,595,880,307.75
  5. Step 5: Solve for x
    x = 15,595,880,307.75/143,630.10
  6. Step 6: Final answer
    x = 108,583.65

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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.