Home / 285,965.36-428,669.12-136,165.40

Finding the Fourth Proportional to 285,965.36, 428,669.12 and 136,165.40

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Solution

The fourth proportional to 285,965.36, 428,669.12 and 136,165.40 is: 204,115.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,965.36 : 428,669.12 = 136,165.40 : x
  2. Step 2: Convert to fraction form
    285,965.36/428,669.12 = 136,165.40/x
  3. Step 3: Cross multiply
    285,965.36x = 428,669.12 × 136,165.40
  4. Step 4: Simplify right side
    285,965.36x = 58,369,902,192.45
  5. Step 5: Solve for x
    x = 58,369,902,192.45/285,965.36
  6. Step 6: Final answer
    x = 204,115.29

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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.