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Finding the Fourth Proportional to 65,788.71, 98,689.29 and 18,403.81

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Solution

The fourth proportional to 65,788.71, 98,689.29 and 18,403.81 is: 27,607.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,788.71 : 98,689.29 = 18,403.81 : x
  2. Step 2: Convert to fraction form
    65,788.71/98,689.29 = 18,403.81/x
  3. Step 3: Cross multiply
    65,788.71x = 98,689.29 × 18,403.81
  4. Step 4: Simplify right side
    65,788.71x = 1,816,258,626.46
  5. Step 5: Solve for x
    x = 1,816,258,626.46/65,788.71
  6. Step 6: Final answer
    x = 27,607.45

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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.