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Finding the Fourth Proportional to 142,999.44, 197,344.50 and 86,399.88

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Solution

The fourth proportional to 142,999.44, 197,344.50 and 86,399.88 is: 119,235.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,999.44 : 197,344.50 = 86,399.88 : x
  2. Step 2: Convert to fraction form
    142,999.44/197,344.50 = 86,399.88/x
  3. Step 3: Cross multiply
    142,999.44x = 197,344.50 × 86,399.88
  4. Step 4: Simplify right side
    142,999.44x = 17,050,541,118.66
  5. Step 5: Solve for x
    x = 17,050,541,118.66/142,999.44
  6. Step 6: Final answer
    x = 119,235.02

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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.