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Finding the Fourth Proportional to 142,958.75, 197,281.64 and 79,294.91

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Solution

The fourth proportional to 142,958.75, 197,281.64 and 79,294.91 is: 109,426.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,958.75 : 197,281.64 = 79,294.91 : x
  2. Step 2: Convert to fraction form
    142,958.75/197,281.64 = 79,294.91/x
  3. Step 3: Cross multiply
    142,958.75x = 197,281.64 × 79,294.91
  4. Step 4: Simplify right side
    142,958.75x = 15,643,429,100.28
  5. Step 5: Solve for x
    x = 15,643,429,100.28/142,958.75
  6. Step 6: Final answer
    x = 109,426.18

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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.