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Finding the Fourth Proportional to 157,138.44, 216,846.89 and 85,516.93

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Solution

The fourth proportional to 157,138.44, 216,846.89 and 85,516.93 is: 118,011.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,138.44 : 216,846.89 = 85,516.93 : x
  2. Step 2: Convert to fraction form
    157,138.44/216,846.89 = 85,516.93/x
  3. Step 3: Cross multiply
    157,138.44x = 216,846.89 × 85,516.93
  4. Step 4: Simplify right side
    157,138.44x = 18,544,078,801.03
  5. Step 5: Solve for x
    x = 18,544,078,801.03/157,138.44
  6. Step 6: Final answer
    x = 118,011.09

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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.