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Finding the Fourth Proportional to 112,728.06, 155,529.45 and 64,974.96

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Solution

The fourth proportional to 112,728.06, 155,529.45 and 64,974.96 is: 89,645.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,728.06 : 155,529.45 = 64,974.96 : x
  2. Step 2: Convert to fraction form
    112,728.06/155,529.45 = 64,974.96/x
  3. Step 3: Cross multiply
    112,728.06x = 155,529.45 × 64,974.96
  4. Step 4: Simplify right side
    112,728.06x = 10,105,519,792.57
  5. Step 5: Solve for x
    x = 10,105,519,792.57/112,728.06
  6. Step 6: Final answer
    x = 89,645.11

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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.