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Finding the Fourth Proportional to 218,740.50, 301,861.89 and 118,138.50

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Solution

The fourth proportional to 218,740.50, 301,861.89 and 118,138.50 is: 163,031.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,740.50 : 301,861.89 = 118,138.50 : x
  2. Step 2: Convert to fraction form
    218,740.50/301,861.89 = 118,138.50/x
  3. Step 3: Cross multiply
    218,740.50x = 301,861.89 × 118,138.50
  4. Step 4: Simplify right side
    218,740.50x = 35,661,510,891.77
  5. Step 5: Solve for x
    x = 35,661,510,891.77/218,740.50
  6. Step 6: Final answer
    x = 163,031.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.