Home / 81,147.64-121,721.48-39,559

Finding the Fourth Proportional to 81,147.64, 121,721.48 and 39,559

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Solution

The fourth proportional to 81,147.64, 121,721.48 and 39,559 is: 59,338.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,147.64 : 121,721.48 = 39,559 : x
  2. Step 2: Convert to fraction form
    81,147.64/121,721.48 = 39,559/x
  3. Step 3: Cross multiply
    81,147.64x = 121,721.48 × 39,559
  4. Step 4: Simplify right side
    81,147.64x = 4,815,180,027.32
  5. Step 5: Solve for x
    x = 4,815,180,027.32/81,147.64
  6. Step 6: Final answer
    x = 59,338.51

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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.