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Finding the Fourth Proportional to 111,879.46, 154,414.38 and 64,133.20

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Solution

The fourth proportional to 111,879.46, 154,414.38 and 64,133.20 is: 88,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,879.46 : 154,414.38 = 64,133.20 : x
  2. Step 2: Convert to fraction form
    111,879.46/154,414.38 = 64,133.20/x
  3. Step 3: Cross multiply
    111,879.46x = 154,414.38 × 64,133.20
  4. Step 4: Simplify right side
    111,879.46x = 9,903,088,315.42
  5. Step 5: Solve for x
    x = 9,903,088,315.42/111,879.46
  6. Step 6: Final answer
    x = 88,515.70

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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.