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Finding the Fourth Proportional to 60,543.90, 90,881.82 and 45,912.78

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Solution

The fourth proportional to 60,543.90, 90,881.82 and 45,912.78 is: 68,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,543.90 : 90,881.82 = 45,912.78 : x
  2. Step 2: Convert to fraction form
    60,543.90/90,881.82 = 45,912.78/x
  3. Step 3: Cross multiply
    60,543.90x = 90,881.82 × 45,912.78
  4. Step 4: Simplify right side
    60,543.90x = 4,172,637,007.66
  5. Step 5: Solve for x
    x = 4,172,637,007.66/60,543.90
  6. Step 6: Final answer
    x = 68,919.20

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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.