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Finding the Fourth Proportional to 65,915.76, 90,963.18 and 35,700.36

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Solution

The fourth proportional to 65,915.76, 90,963.18 and 35,700.36 is: 49,266.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,915.76 : 90,963.18 = 35,700.36 : x
  2. Step 2: Convert to fraction form
    65,915.76/90,963.18 = 35,700.36/x
  3. Step 3: Cross multiply
    65,915.76x = 90,963.18 × 35,700.36
  4. Step 4: Simplify right side
    65,915.76x = 3,247,418,272.74
  5. Step 5: Solve for x
    x = 3,247,418,272.74/65,915.76
  6. Step 6: Final answer
    x = 49,266.19

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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.