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Finding the Fourth Proportional to 145,869.69, 218,717.04 and 66,884.97

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Solution

The fourth proportional to 145,869.69, 218,717.04 and 66,884.97 is: 100,287.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,869.69 : 218,717.04 = 66,884.97 : x
  2. Step 2: Convert to fraction form
    145,869.69/218,717.04 = 66,884.97/x
  3. Step 3: Cross multiply
    145,869.69x = 218,717.04 × 66,884.97
  4. Step 4: Simplify right side
    145,869.69x = 14,628,882,658.89
  5. Step 5: Solve for x
    x = 14,628,882,658.89/145,869.69
  6. Step 6: Final answer
    x = 100,287.34

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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.