Home / 81,059.14-121,605-28,461.70

Finding the Fourth Proportional to 81,059.14, 121,605 and 28,461.70

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Solution

The fourth proportional to 81,059.14, 121,605 and 28,461.70 is: 42,698.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,059.14 : 121,605 = 28,461.70 : x
  2. Step 2: Convert to fraction form
    81,059.14/121,605 = 28,461.70/x
  3. Step 3: Cross multiply
    81,059.14x = 121,605 × 28,461.70
  4. Step 4: Simplify right side
    81,059.14x = 3,461,085,028.50
  5. Step 5: Solve for x
    x = 3,461,085,028.50/81,059.14
  6. Step 6: Final answer
    x = 42,698.27

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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.