Home / 81,033.20-121,603.08-28,441.28

Finding the Fourth Proportional to 81,033.20, 121,603.08 and 28,441.28

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Solution

The fourth proportional to 81,033.20, 121,603.08 and 28,441.28 is: 42,680.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,033.20 : 121,603.08 = 28,441.28 : x
  2. Step 2: Convert to fraction form
    81,033.20/121,603.08 = 28,441.28/x
  3. Step 3: Cross multiply
    81,033.20x = 121,603.08 × 28,441.28
  4. Step 4: Simplify right side
    81,033.20x = 3,458,547,247.14
  5. Step 5: Solve for x
    x = 3,458,547,247.14/81,033.20
  6. Step 6: Final answer
    x = 42,680.62

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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.