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Finding the Fourth Proportional to 157,658.79, 217,573.73 and 86,043.45

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Solution

The fourth proportional to 157,658.79, 217,573.73 and 86,043.45 is: 118,742.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,658.79 : 217,573.73 = 86,043.45 : x
  2. Step 2: Convert to fraction form
    157,658.79/217,573.73 = 86,043.45/x
  3. Step 3: Cross multiply
    157,658.79x = 217,573.73 × 86,043.45
  4. Step 4: Simplify right side
    157,658.79x = 18,720,794,358.57
  5. Step 5: Solve for x
    x = 18,720,794,358.57/157,658.79
  6. Step 6: Final answer
    x = 118,742.47

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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.