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Finding the Fourth Proportional to 215,781.84, 297,585.90 and 135,218.16

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Solution

The fourth proportional to 215,781.84, 297,585.90 and 135,218.16 is: 186,480.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,781.84 : 297,585.90 = 135,218.16 : x
  2. Step 2: Convert to fraction form
    215,781.84/297,585.90 = 135,218.16/x
  3. Step 3: Cross multiply
    215,781.84x = 297,585.90 × 135,218.16
  4. Step 4: Simplify right side
    215,781.84x = 40,239,017,839.94
  5. Step 5: Solve for x
    x = 40,239,017,839.94/215,781.84
  6. Step 6: Final answer
    x = 186,480.09

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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.