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Finding the Fourth Proportional to 154,387.60, 231,581.40 and 65,618.80

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Solution

The fourth proportional to 154,387.60, 231,581.40 and 65,618.80 is: 98,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,387.60 : 231,581.40 = 65,618.80 : x
  2. Step 2: Convert to fraction form
    154,387.60/231,581.40 = 65,618.80/x
  3. Step 3: Cross multiply
    154,387.60x = 231,581.40 × 65,618.80
  4. Step 4: Simplify right side
    154,387.60x = 15,196,093,570.32
  5. Step 5: Solve for x
    x = 15,196,093,570.32/154,387.60
  6. Step 6: Final answer
    x = 98,428.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.