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Finding the Fourth Proportional to 99,061.74, 136,602.43 and 84,768.87

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Solution

The fourth proportional to 99,061.74, 136,602.43 and 84,768.87 is: 116,893.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,061.74 : 136,602.43 = 84,768.87 : x
  2. Step 2: Convert to fraction form
    99,061.74/136,602.43 = 84,768.87/x
  3. Step 3: Cross multiply
    99,061.74x = 136,602.43 × 84,768.87
  4. Step 4: Simplify right side
    99,061.74x = 11,579,633,630.35
  5. Step 5: Solve for x
    x = 11,579,633,630.35/99,061.74
  6. Step 6: Final answer
    x = 116,893.10

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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.