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Finding the Fourth Proportional to 218,102.20, 326,910.30 and 84,938.20

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Solution

The fourth proportional to 218,102.20, 326,910.30 and 84,938.20 is: 127,312.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,102.20 : 326,910.30 = 84,938.20 : x
  2. Step 2: Convert to fraction form
    218,102.20/326,910.30 = 84,938.20/x
  3. Step 3: Cross multiply
    218,102.20x = 326,910.30 × 84,938.20
  4. Step 4: Simplify right side
    218,102.20x = 27,767,172,443.46
  5. Step 5: Solve for x
    x = 27,767,172,443.46/218,102.20
  6. Step 6: Final answer
    x = 127,312.67

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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.