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Finding the Fourth Proportional to 111,658.50, 154,160.01 and 77,654.70

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Solution

The fourth proportional to 111,658.50, 154,160.01 and 77,654.70 is: 107,213.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,658.50 : 154,160.01 = 77,654.70 : x
  2. Step 2: Convert to fraction form
    111,658.50/154,160.01 = 77,654.70/x
  3. Step 3: Cross multiply
    111,658.50x = 154,160.01 × 77,654.70
  4. Step 4: Simplify right side
    111,658.50x = 11,971,249,328.55
  5. Step 5: Solve for x
    x = 11,971,249,328.55/111,658.50
  6. Step 6: Final answer
    x = 107,213.06

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1.5x scale

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.