Home / 57,128.40-78,837.23-31,286.82

Finding the Fourth Proportional to 57,128.40, 78,837.23 and 31,286.82

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Solution

The fourth proportional to 57,128.40, 78,837.23 and 31,286.82 is: 43,175.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.40 : 78,837.23 = 31,286.82 : x
  2. Step 2: Convert to fraction form
    57,128.40/78,837.23 = 31,286.82/x
  3. Step 3: Cross multiply
    57,128.40x = 78,837.23 × 31,286.82
  4. Step 4: Simplify right side
    57,128.40x = 2,466,566,598.17
  5. Step 5: Solve for x
    x = 2,466,566,598.17/57,128.40
  6. Step 6: Final answer
    x = 43,175.84

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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.