Home / 81,509.45-122,250.15-21,538.58

Finding the Fourth Proportional to 81,509.45, 122,250.15 and 21,538.58

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Solution

The fourth proportional to 81,509.45, 122,250.15 and 21,538.58 is: 32,304.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,509.45 : 122,250.15 = 21,538.58 : x
  2. Step 2: Convert to fraction form
    81,509.45/122,250.15 = 21,538.58/x
  3. Step 3: Cross multiply
    81,509.45x = 122,250.15 × 21,538.58
  4. Step 4: Simplify right side
    81,509.45x = 2,633,094,024.54
  5. Step 5: Solve for x
    x = 2,633,094,024.54/81,509.45
  6. Step 6: Final answer
    x = 32,304.16

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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.