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Finding the Fourth Proportional to 142,911.80, 197,226.16 and 79,248.24

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Solution

The fourth proportional to 142,911.80, 197,226.16 and 79,248.24 is: 109,366.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,911.80 : 197,226.16 = 79,248.24 : x
  2. Step 2: Convert to fraction form
    142,911.80/197,226.16 = 79,248.24/x
  3. Step 3: Cross multiply
    142,911.80x = 197,226.16 × 79,248.24
  4. Step 4: Simplify right side
    142,911.80x = 15,629,826,061.96
  5. Step 5: Solve for x
    x = 15,629,826,061.96/142,911.80
  6. Step 6: Final answer
    x = 109,366.94

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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.