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Finding the Fourth Proportional to 102,991.67, 154,503.30 and 43,811.45

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Solution

The fourth proportional to 102,991.67, 154,503.30 and 43,811.45 is: 65,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.67 : 154,503.30 = 43,811.45 : x
  2. Step 2: Convert to fraction form
    102,991.67/154,503.30 = 43,811.45/x
  3. Step 3: Cross multiply
    102,991.67x = 154,503.30 × 43,811.45
  4. Step 4: Simplify right side
    102,991.67x = 6,769,013,602.79
  5. Step 5: Solve for x
    x = 6,769,013,602.79/102,991.67
  6. Step 6: Final answer
    x = 65,723.89

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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.