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Finding the Fourth Proportional to 286,687.12, 429,872.72 and 136,965.12

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Solution

The fourth proportional to 286,687.12, 429,872.72 and 136,965.12 is: 205,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,687.12 : 429,872.72 = 136,965.12 : x
  2. Step 2: Convert to fraction form
    286,687.12/429,872.72 = 136,965.12/x
  3. Step 3: Cross multiply
    286,687.12x = 429,872.72 × 136,965.12
  4. Step 4: Simplify right side
    286,687.12x = 58,877,568,679.53
  5. Step 5: Solve for x
    x = 58,877,568,679.53/286,687.12
  6. Step 6: Final answer
    x = 205,372.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.