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Finding the Fourth Proportional to 218,117.52, 300,979.16 and 121,305.68

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Solution

The fourth proportional to 218,117.52, 300,979.16 and 121,305.68 is: 167,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,117.52 : 300,979.16 = 121,305.68 : x
  2. Step 2: Convert to fraction form
    218,117.52/300,979.16 = 121,305.68/x
  3. Step 3: Cross multiply
    218,117.52x = 300,979.16 × 121,305.68
  4. Step 4: Simplify right side
    218,117.52x = 36,510,481,669.63
  5. Step 5: Solve for x
    x = 36,510,481,669.63/218,117.52
  6. Step 6: Final answer
    x = 167,389.04

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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.