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Finding the Fourth Proportional to 126,011.62, 188,995.56 and 42,905.62

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Solution

The fourth proportional to 126,011.62, 188,995.56 and 42,905.62 is: 64,350.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,011.62 : 188,995.56 = 42,905.62 : x
  2. Step 2: Convert to fraction form
    126,011.62/188,995.56 = 42,905.62/x
  3. Step 3: Cross multiply
    126,011.62x = 188,995.56 × 42,905.62
  4. Step 4: Simplify right side
    126,011.62x = 8,108,971,679.05
  5. Step 5: Solve for x
    x = 8,108,971,679.05/126,011.62
  6. Step 6: Final answer
    x = 64,350.98

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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.