Home / 56,872.04-78,485.10-31,721

Finding the Fourth Proportional to 56,872.04, 78,485.10 and 31,721

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Solution

The fourth proportional to 56,872.04, 78,485.10 and 31,721 is: 43,775.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,872.04 : 78,485.10 = 31,721 : x
  2. Step 2: Convert to fraction form
    56,872.04/78,485.10 = 31,721/x
  3. Step 3: Cross multiply
    56,872.04x = 78,485.10 × 31,721
  4. Step 4: Simplify right side
    56,872.04x = 2,489,625,857.10
  5. Step 5: Solve for x
    x = 2,489,625,857.10/56,872.04
  6. Step 6: Final answer
    x = 43,775.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.