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Finding the Fourth Proportional to 145,403.67, 218,105.56 and 45,571.61

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Solution

The fourth proportional to 145,403.67, 218,105.56 and 45,571.61 is: 68,357.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,403.67 : 218,105.56 = 45,571.61 : x
  2. Step 2: Convert to fraction form
    145,403.67/218,105.56 = 45,571.61/x
  3. Step 3: Cross multiply
    145,403.67x = 218,105.56 × 45,571.61
  4. Step 4: Simplify right side
    145,403.67x = 9,939,421,047.14
  5. Step 5: Solve for x
    x = 9,939,421,047.14/145,403.67
  6. Step 6: Final answer
    x = 68,357.43

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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.