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Finding the Fourth Proportional to 157,878.03, 217,874.82 and 86,262.49

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Solution

The fourth proportional to 157,878.03, 217,874.82 and 86,262.49 is: 119,043.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,878.03 : 217,874.82 = 86,262.49 : x
  2. Step 2: Convert to fraction form
    157,878.03/217,874.82 = 86,262.49/x
  3. Step 3: Cross multiply
    157,878.03x = 217,874.82 × 86,262.49
  4. Step 4: Simplify right side
    157,878.03x = 18,794,423,721.16
  5. Step 5: Solve for x
    x = 18,794,423,721.16/157,878.03
  6. Step 6: Final answer
    x = 119,043.95

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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.