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Finding the Fourth Proportional to 81,438.88, 122,080.56 and 25,998.88

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Solution

The fourth proportional to 81,438.88, 122,080.56 and 25,998.88 is: 38,973.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,438.88 : 122,080.56 = 25,998.88 : x
  2. Step 2: Convert to fraction form
    81,438.88/122,080.56 = 25,998.88/x
  3. Step 3: Cross multiply
    81,438.88x = 122,080.56 × 25,998.88
  4. Step 4: Simplify right side
    81,438.88x = 3,173,957,829.77
  5. Step 5: Solve for x
    x = 3,173,957,829.77/81,438.88
  6. Step 6: Final answer
    x = 38,973.50

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1.5x scale

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.