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Finding the Fourth Proportional to 100,956.70, 151,267.64 and 61,394.14

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Solution

The fourth proportional to 100,956.70, 151,267.64 and 61,394.14 is: 91,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,956.70 : 151,267.64 = 61,394.14 : x
  2. Step 2: Convert to fraction form
    100,956.70/151,267.64 = 61,394.14/x
  3. Step 3: Cross multiply
    100,956.70x = 151,267.64 × 61,394.14
  4. Step 4: Simplify right side
    100,956.70x = 9,286,946,667.63
  5. Step 5: Solve for x
    x = 9,286,946,667.63/100,956.70
  6. Step 6: Final answer
    x = 91,989.40

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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.