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Finding the Fourth Proportional to 145,645.70, 218,493.45 and 66,766.70

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Solution

The fourth proportional to 145,645.70, 218,493.45 and 66,766.70 is: 100,161.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,645.70 : 218,493.45 = 66,766.70 : x
  2. Step 2: Convert to fraction form
    145,645.70/218,493.45 = 66,766.70/x
  3. Step 3: Cross multiply
    145,645.70x = 218,493.45 × 66,766.70
  4. Step 4: Simplify right side
    145,645.70x = 14,588,086,628.12
  5. Step 5: Solve for x
    x = 14,588,086,628.12/145,645.70
  6. Step 6: Final answer
    x = 100,161.46

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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.