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Finding the Fourth Proportional to 60,582.88, 90,915.86 and 21,140.02

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Solution

The fourth proportional to 60,582.88, 90,915.86 and 21,140.02 is: 31,724.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,582.88 : 90,915.86 = 21,140.02 : x
  2. Step 2: Convert to fraction form
    60,582.88/90,915.86 = 21,140.02/x
  3. Step 3: Cross multiply
    60,582.88x = 90,915.86 × 21,140.02
  4. Step 4: Simplify right side
    60,582.88x = 1,921,963,098.72
  5. Step 5: Solve for x
    x = 1,921,963,098.72/60,582.88
  6. Step 6: Final answer
    x = 31,724.53

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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.