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Finding the Fourth Proportional to 143,898.84, 215,846.91 and 80,718.84

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Solution

The fourth proportional to 143,898.84, 215,846.91 and 80,718.84 is: 121,077.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,898.84 : 215,846.91 = 80,718.84 : x
  2. Step 2: Convert to fraction form
    143,898.84/215,846.91 = 80,718.84/x
  3. Step 3: Cross multiply
    143,898.84x = 215,846.91 × 80,718.84
  4. Step 4: Simplify right side
    143,898.84x = 17,422,912,192.78
  5. Step 5: Solve for x
    x = 17,422,912,192.78/143,898.84
  6. Step 6: Final answer
    x = 121,077.50

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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.