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Finding the Fourth Proportional to 111,703.68, 154,036.80 and 73,964.16

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Solution

The fourth proportional to 111,703.68, 154,036.80 and 73,964.16 is: 101,994.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,703.68 : 154,036.80 = 73,964.16 : x
  2. Step 2: Convert to fraction form
    111,703.68/154,036.80 = 73,964.16/x
  3. Step 3: Cross multiply
    111,703.68x = 154,036.80 × 73,964.16
  4. Step 4: Simplify right side
    111,703.68x = 11,393,202,521.09
  5. Step 5: Solve for x
    x = 11,393,202,521.09/111,703.68
  6. Step 6: Final answer
    x = 101,994.87

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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.