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Finding the Fourth Proportional to 145,874.70, 218,812.05 and 83,493.90

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Solution

The fourth proportional to 145,874.70, 218,812.05 and 83,493.90 is: 125,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,874.70 : 218,812.05 = 83,493.90 : x
  2. Step 2: Convert to fraction form
    145,874.70/218,812.05 = 83,493.90/x
  3. Step 3: Cross multiply
    145,874.70x = 218,812.05 × 83,493.90
  4. Step 4: Simplify right side
    145,874.70x = 18,269,471,421.50
  5. Step 5: Solve for x
    x = 18,269,471,421.50/145,874.70
  6. Step 6: Final answer
    x = 125,240.85

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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.