Home / 61,138.20-91,686.60-21,689.64

Finding the Fourth Proportional to 61,138.20, 91,686.60 and 21,689.64

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Solution

The fourth proportional to 61,138.20, 91,686.60 and 21,689.64 is: 32,527.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,138.20 : 91,686.60 = 21,689.64 : x
  2. Step 2: Convert to fraction form
    61,138.20/91,686.60 = 21,689.64/x
  3. Step 3: Cross multiply
    61,138.20x = 91,686.60 × 21,689.64
  4. Step 4: Simplify right side
    61,138.20x = 1,988,649,346.82
  5. Step 5: Solve for x
    x = 1,988,649,346.82/61,138.20
  6. Step 6: Final answer
    x = 32,527.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.