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Finding the Fourth Proportional to 102,667.80, 154,116.90 and 79,397.40

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Solution

The fourth proportional to 102,667.80, 154,116.90 and 79,397.40 is: 119,185.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,667.80 : 154,116.90 = 79,397.40 : x
  2. Step 2: Convert to fraction form
    102,667.80/154,116.90 = 79,397.40/x
  3. Step 3: Cross multiply
    102,667.80x = 154,116.90 × 79,397.40
  4. Step 4: Simplify right side
    102,667.80x = 12,236,481,156.06
  5. Step 5: Solve for x
    x = 12,236,481,156.06/102,667.80
  6. Step 6: Final answer
    x = 119,185.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.