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Finding the Fourth Proportional to 218,909.70, 328,510.35 and 100,520.10

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Solution

The fourth proportional to 218,909.70, 328,510.35 and 100,520.10 is: 150,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,909.70 : 328,510.35 = 100,520.10 : x
  2. Step 2: Convert to fraction form
    218,909.70/328,510.35 = 100,520.10/x
  3. Step 3: Cross multiply
    218,909.70x = 328,510.35 × 100,520.10
  4. Step 4: Simplify right side
    218,909.70x = 33,021,893,233.04
  5. Step 5: Solve for x
    x = 33,021,893,233.04/218,909.70
  6. Step 6: Final answer
    x = 150,847.10

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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.