Home / 97,431.72-134,456.40-57,137.28

Finding the Fourth Proportional to 97,431.72, 134,456.40 and 57,137.28

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Solution

The fourth proportional to 97,431.72, 134,456.40 and 57,137.28 is: 78,849.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,431.72 : 134,456.40 = 57,137.28 : x
  2. Step 2: Convert to fraction form
    97,431.72/134,456.40 = 57,137.28/x
  3. Step 3: Cross multiply
    97,431.72x = 134,456.40 × 57,137.28
  4. Step 4: Simplify right side
    97,431.72x = 7,682,472,974.59
  5. Step 5: Solve for x
    x = 7,682,472,974.59/97,431.72
  6. Step 6: Final answer
    x = 78,849.81

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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.