Home / 106,356.78-159,141.33-78,297.66

Finding the Fourth Proportional to 106,356.78, 159,141.33 and 78,297.66

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Solution

The fourth proportional to 106,356.78, 159,141.33 and 78,297.66 is: 117,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,356.78 : 159,141.33 = 78,297.66 : x
  2. Step 2: Convert to fraction form
    106,356.78/159,141.33 = 78,297.66/x
  3. Step 3: Cross multiply
    106,356.78x = 159,141.33 × 78,297.66
  4. Step 4: Simplify right side
    106,356.78x = 12,460,393,748.29
  5. Step 5: Solve for x
    x = 12,460,393,748.29/106,356.78
  6. Step 6: Final answer
    x = 117,156.55

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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.