Home / 421,042.80-631,606.72-136,721.44

Finding the Fourth Proportional to 421,042.80, 631,606.72 and 136,721.44

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Solution

The fourth proportional to 421,042.80, 631,606.72 and 136,721.44 is: 205,095.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,042.80 : 631,606.72 = 136,721.44 : x
  2. Step 2: Convert to fraction form
    421,042.80/631,606.72 = 136,721.44/x
  3. Step 3: Cross multiply
    421,042.80x = 631,606.72 × 136,721.44
  4. Step 4: Simplify right side
    421,042.80x = 86,354,180,272.08
  5. Step 5: Solve for x
    x = 86,354,180,272.08/421,042.80
  6. Step 6: Final answer
    x = 205,095.97

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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.