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Finding the Fourth Proportional to 142,958.96, 197,266.56 and 79,281.12

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Solution

The fourth proportional to 142,958.96, 197,266.56 and 79,281.12 is: 109,398.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,958.96 : 197,266.56 = 79,281.12 : x
  2. Step 2: Convert to fraction form
    142,958.96/197,266.56 = 79,281.12/x
  3. Step 3: Cross multiply
    142,958.96x = 197,266.56 × 79,281.12
  4. Step 4: Simplify right side
    142,958.96x = 15,639,513,815.35
  5. Step 5: Solve for x
    x = 15,639,513,815.35/142,958.96
  6. Step 6: Final answer
    x = 109,398.63

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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.