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Finding the Fourth Proportional to 111,778.72, 154,253.28 and 61,476.64

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Solution

The fourth proportional to 111,778.72, 154,253.28 and 61,476.64 is: 84,837.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,778.72 : 154,253.28 = 61,476.64 : x
  2. Step 2: Convert to fraction form
    111,778.72/154,253.28 = 61,476.64/x
  3. Step 3: Cross multiply
    111,778.72x = 154,253.28 × 61,476.64
  4. Step 4: Simplify right side
    111,778.72x = 9,482,973,363.38
  5. Step 5: Solve for x
    x = 9,482,973,363.38/111,778.72
  6. Step 6: Final answer
    x = 84,837.02

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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.