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Finding the Fourth Proportional to 97,431.92, 134,546.91 and 71,712.80

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Solution

The fourth proportional to 97,431.92, 134,546.91 and 71,712.80 is: 99,030.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,431.92 : 134,546.91 = 71,712.80 : x
  2. Step 2: Convert to fraction form
    97,431.92/134,546.91 = 71,712.80/x
  3. Step 3: Cross multiply
    97,431.92x = 134,546.91 × 71,712.80
  4. Step 4: Simplify right side
    97,431.92x = 9,648,735,647.45
  5. Step 5: Solve for x
    x = 9,648,735,647.45/97,431.92
  6. Step 6: Final answer
    x = 99,030.54

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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.