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Finding the Fourth Proportional to 105,548.20, 158,187.90 and 43,148.20

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Solution

The fourth proportional to 105,548.20, 158,187.90 and 43,148.20 is: 64,667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,548.20 : 158,187.90 = 43,148.20 : x
  2. Step 2: Convert to fraction form
    105,548.20/158,187.90 = 43,148.20/x
  3. Step 3: Cross multiply
    105,548.20x = 158,187.90 × 43,148.20
  4. Step 4: Simplify right side
    105,548.20x = 6,825,523,146.78
  5. Step 5: Solve for x
    x = 6,825,523,146.78/105,548.20
  6. Step 6: Final answer
    x = 64,667.36

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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.