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Finding the Fourth Proportional to 61,639.48, 85,061.65 and 34,415.98

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Solution

The fourth proportional to 61,639.48, 85,061.65 and 34,415.98 is: 47,493.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,639.48 : 85,061.65 = 34,415.98 : x
  2. Step 2: Convert to fraction form
    61,639.48/85,061.65 = 34,415.98/x
  3. Step 3: Cross multiply
    61,639.48x = 85,061.65 × 34,415.98
  4. Step 4: Simplify right side
    61,639.48x = 2,927,480,049.32
  5. Step 5: Solve for x
    x = 2,927,480,049.32/61,639.48
  6. Step 6: Final answer
    x = 47,493.59

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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.