Home / 57,128.13-78,837.03-31,977.63

Finding the Fourth Proportional to 57,128.13, 78,837.03 and 31,977.63

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Solution

The fourth proportional to 57,128.13, 78,837.03 and 31,977.63 is: 44,129.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.13 : 78,837.03 = 31,977.63 : x
  2. Step 2: Convert to fraction form
    57,128.13/78,837.03 = 31,977.63/x
  3. Step 3: Cross multiply
    57,128.13x = 78,837.03 × 31,977.63
  4. Step 4: Simplify right side
    57,128.13x = 2,521,021,375.64
  5. Step 5: Solve for x
    x = 2,521,021,375.64/57,128.13
  6. Step 6: Final answer
    x = 44,129.25

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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.