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Finding the Fourth Proportional to 145,982.80, 218,910.20 and 67,070.80

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Solution

The fourth proportional to 145,982.80, 218,910.20 and 67,070.80 is: 100,576.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,982.80 : 218,910.20 = 67,070.80 : x
  2. Step 2: Convert to fraction form
    145,982.80/218,910.20 = 67,070.80/x
  3. Step 3: Cross multiply
    145,982.80x = 218,910.20 × 67,070.80
  4. Step 4: Simplify right side
    145,982.80x = 14,682,482,242.16
  5. Step 5: Solve for x
    x = 14,682,482,242.16/145,982.80
  6. Step 6: Final answer
    x = 100,576.80

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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.