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Finding the Fourth Proportional to 218,471.36, 301,491.12 and 122,979.52

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Solution

The fourth proportional to 218,471.36, 301,491.12 and 122,979.52 is: 169,712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,471.36 : 301,491.12 = 122,979.52 : x
  2. Step 2: Convert to fraction form
    218,471.36/301,491.12 = 122,979.52/x
  3. Step 3: Cross multiply
    218,471.36x = 301,491.12 × 122,979.52
  4. Step 4: Simplify right side
    218,471.36x = 37,077,233,221.86
  5. Step 5: Solve for x
    x = 37,077,233,221.86/218,471.36
  6. Step 6: Final answer
    x = 169,712.10

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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.