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Finding the Fourth Proportional to 111,780.74, 154,179.32 and 75,908.48

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Solution

The fourth proportional to 111,780.74, 154,179.32 and 75,908.48 is: 104,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,780.74 : 154,179.32 = 75,908.48 : x
  2. Step 2: Convert to fraction form
    111,780.74/154,179.32 = 75,908.48/x
  3. Step 3: Cross multiply
    111,780.74x = 154,179.32 × 75,908.48
  4. Step 4: Simplify right side
    111,780.74x = 11,703,516,678.19
  5. Step 5: Solve for x
    x = 11,703,516,678.19/111,780.74
  6. Step 6: Final answer
    x = 104,700.65

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1.5x scale

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.