Home / 81,810.14-122,729.18-25,639.47

Finding the Fourth Proportional to 81,810.14, 122,729.18 and 25,639.47

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Solution

The fourth proportional to 81,810.14, 122,729.18 and 25,639.47 is: 38,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,810.14 : 122,729.18 = 25,639.47 : x
  2. Step 2: Convert to fraction form
    81,810.14/122,729.18 = 25,639.47/x
  3. Step 3: Cross multiply
    81,810.14x = 122,729.18 × 25,639.47
  4. Step 4: Simplify right side
    81,810.14x = 3,146,711,000.54
  5. Step 5: Solve for x
    x = 3,146,711,000.54/81,810.14
  6. Step 6: Final answer
    x = 38,463.58

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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.