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Finding the Fourth Proportional to 143,915.72, 215,593.08 and 87,616.22

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Solution

The fourth proportional to 143,915.72, 215,593.08 and 87,616.22 is: 131,253.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,915.72 : 215,593.08 = 87,616.22 : x
  2. Step 2: Convert to fraction form
    143,915.72/215,593.08 = 87,616.22/x
  3. Step 3: Cross multiply
    143,915.72x = 215,593.08 × 87,616.22
  4. Step 4: Simplify right side
    143,915.72x = 18,889,450,727.76
  5. Step 5: Solve for x
    x = 18,889,450,727.76/143,915.72
  6. Step 6: Final answer
    x = 131,253.56

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1.5x scale

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.