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Finding the Fourth Proportional to 99,091.76, 136,737.60 and 58,798.58

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Solution

The fourth proportional to 99,091.76, 136,737.60 and 58,798.58 is: 81,136.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,091.76 : 136,737.60 = 58,798.58 : x
  2. Step 2: Convert to fraction form
    99,091.76/136,737.60 = 58,798.58/x
  3. Step 3: Cross multiply
    99,091.76x = 136,737.60 × 58,798.58
  4. Step 4: Simplify right side
    99,091.76x = 8,039,976,712.61
  5. Step 5: Solve for x
    x = 8,039,976,712.61/99,091.76
  6. Step 6: Final answer
    x = 81,136.68

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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.