Home / 56,721.53-85,079.70-21,180.08

Finding the Fourth Proportional to 56,721.53, 85,079.70 and 21,180.08

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Solution

The fourth proportional to 56,721.53, 85,079.70 and 21,180.08 is: 31,769.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.53 : 85,079.70 = 21,180.08 : x
  2. Step 2: Convert to fraction form
    56,721.53/85,079.70 = 21,180.08/x
  3. Step 3: Cross multiply
    56,721.53x = 85,079.70 × 21,180.08
  4. Step 4: Simplify right side
    56,721.53x = 1,801,994,426.98
  5. Step 5: Solve for x
    x = 1,801,994,426.98/56,721.53
  6. Step 6: Final answer
    x = 31,769.15

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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.