Home / 215,098.38-322,356.91-81,905.98

Finding the Fourth Proportional to 215,098.38, 322,356.91 and 81,905.98

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Solution

The fourth proportional to 215,098.38, 322,356.91 and 81,905.98 is: 122,748.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,098.38 : 322,356.91 = 81,905.98 : x
  2. Step 2: Convert to fraction form
    215,098.38/322,356.91 = 81,905.98/x
  3. Step 3: Cross multiply
    215,098.38x = 322,356.91 × 81,905.98
  4. Step 4: Simplify right side
    215,098.38x = 26,402,958,623.32
  5. Step 5: Solve for x
    x = 26,402,958,623.32/215,098.38
  6. Step 6: Final answer
    x = 122,748.29

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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.