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Finding the Fourth Proportional to 61,632.80, 85,043.76 and 34,773.20

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Solution

The fourth proportional to 61,632.80, 85,043.76 and 34,773.20 is: 47,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,632.80 : 85,043.76 = 34,773.20 : x
  2. Step 2: Convert to fraction form
    61,632.80/85,043.76 = 34,773.20/x
  3. Step 3: Cross multiply
    61,632.80x = 85,043.76 × 34,773.20
  4. Step 4: Simplify right side
    61,632.80x = 2,957,243,675.23
  5. Step 5: Solve for x
    x = 2,957,243,675.23/61,632.80
  6. Step 6: Final answer
    x = 47,981.65

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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.