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Finding the Fourth Proportional to 111,576.78, 153,975.93 and 61,275.78

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Solution

The fourth proportional to 111,576.78, 153,975.93 and 61,275.78 is: 84,560.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,576.78 : 153,975.93 = 61,275.78 : x
  2. Step 2: Convert to fraction form
    111,576.78/153,975.93 = 61,275.78/x
  3. Step 3: Cross multiply
    111,576.78x = 153,975.93 × 61,275.78
  4. Step 4: Simplify right side
    111,576.78x = 9,434,995,211.98
  5. Step 5: Solve for x
    x = 9,434,995,211.98/111,576.78
  6. Step 6: Final answer
    x = 84,560.56

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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.