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Finding the Fourth Proportional to 65,290.64, 90,128.66 and 44,098.61

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Solution

The fourth proportional to 65,290.64, 90,128.66 and 44,098.61 is: 60,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,290.64 : 90,128.66 = 44,098.61 : x
  2. Step 2: Convert to fraction form
    65,290.64/90,128.66 = 44,098.61/x
  3. Step 3: Cross multiply
    65,290.64x = 90,128.66 × 44,098.61
  4. Step 4: Simplify right side
    65,290.64x = 3,974,547,956.03
  5. Step 5: Solve for x
    x = 3,974,547,956.03/65,290.64
  6. Step 6: Final answer
    x = 60,874.70

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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.