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Finding the Fourth Proportional to 98,479.84, 135,912.18 and 58,206.64

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Solution

The fourth proportional to 98,479.84, 135,912.18 and 58,206.64 is: 80,331.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,479.84 : 135,912.18 = 58,206.64 : x
  2. Step 2: Convert to fraction form
    98,479.84/135,912.18 = 58,206.64/x
  3. Step 3: Cross multiply
    98,479.84x = 135,912.18 × 58,206.64
  4. Step 4: Simplify right side
    98,479.84x = 7,910,991,332.88
  5. Step 5: Solve for x
    x = 7,910,991,332.88/98,479.84
  6. Step 6: Final answer
    x = 80,331.07

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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.