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Finding the Fourth Proportional to 111,670.70, 154,129.86 and 68,687.13

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Solution

The fourth proportional to 111,670.70, 154,129.86 and 68,687.13 is: 94,803.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,670.70 : 154,129.86 = 68,687.13 : x
  2. Step 2: Convert to fraction form
    111,670.70/154,129.86 = 68,687.13/x
  3. Step 3: Cross multiply
    111,670.70x = 154,129.86 × 68,687.13
  4. Step 4: Simplify right side
    111,670.70x = 10,586,737,730.70
  5. Step 5: Solve for x
    x = 10,586,737,730.70/111,670.70
  6. Step 6: Final answer
    x = 94,803.19

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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.