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Finding the Fourth Proportional to 157,620.60, 217,522.70 and 89,643.78

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Solution

The fourth proportional to 157,620.60, 217,522.70 and 89,643.78 is: 123,711.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,620.60 : 217,522.70 = 89,643.78 : x
  2. Step 2: Convert to fraction form
    157,620.60/217,522.70 = 89,643.78/x
  3. Step 3: Cross multiply
    157,620.60x = 217,522.70 × 89,643.78
  4. Step 4: Simplify right side
    157,620.60x = 19,499,557,063.81
  5. Step 5: Solve for x
    x = 19,499,557,063.81/157,620.60
  6. Step 6: Final answer
    x = 123,711.98

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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.