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Finding the Fourth Proportional to 121,011.64, 166,972.16 and 73,269.44

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Solution

The fourth proportional to 121,011.64, 166,972.16 and 73,269.44 is: 101,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,011.64 : 166,972.16 = 73,269.44 : x
  2. Step 2: Convert to fraction form
    121,011.64/166,972.16 = 73,269.44/x
  3. Step 3: Cross multiply
    121,011.64x = 166,972.16 × 73,269.44
  4. Step 4: Simplify right side
    121,011.64x = 12,233,956,658.79
  5. Step 5: Solve for x
    x = 12,233,956,658.79/121,011.64
  6. Step 6: Final answer
    x = 101,097.35

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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.