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Finding the Fourth Proportional to 157,818.35, 217,780.49 and 89,851.92

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Solution

The fourth proportional to 157,818.35, 217,780.49 and 89,851.92 is: 123,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,818.35 : 217,780.49 = 89,851.92 : x
  2. Step 2: Convert to fraction form
    157,818.35/217,780.49 = 89,851.92/x
  3. Step 3: Cross multiply
    157,818.35x = 217,780.49 × 89,851.92
  4. Step 4: Simplify right side
    157,818.35x = 19,567,995,389.67
  5. Step 5: Solve for x
    x = 19,567,995,389.67/157,818.35
  6. Step 6: Final answer
    x = 123,990.63

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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.