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Finding the Fourth Proportional to 157,859.41, 217,846.76 and 86,240.63

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Solution

The fourth proportional to 157,859.41, 217,846.76 and 86,240.63 is: 119,012.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,859.41 : 217,846.76 = 86,240.63 : x
  2. Step 2: Convert to fraction form
    157,859.41/217,846.76 = 86,240.63/x
  3. Step 3: Cross multiply
    157,859.41x = 217,846.76 × 86,240.63
  4. Step 4: Simplify right side
    157,859.41x = 18,787,241,825.86
  5. Step 5: Solve for x
    x = 18,787,241,825.86/157,859.41
  6. Step 6: Final answer
    x = 119,012.49

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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.