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Finding the Fourth Proportional to 153,658.97, 212,033.85 and 85,669.56

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Solution

The fourth proportional to 153,658.97, 212,033.85 and 85,669.56 is: 118,215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,658.97 : 212,033.85 = 85,669.56 : x
  2. Step 2: Convert to fraction form
    153,658.97/212,033.85 = 85,669.56/x
  3. Step 3: Cross multiply
    153,658.97x = 212,033.85 × 85,669.56
  4. Step 4: Simplify right side
    153,658.97x = 18,164,845,574.44
  5. Step 5: Solve for x
    x = 18,164,845,574.44/153,658.97
  6. Step 6: Final answer
    x = 118,215.33

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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.