Home / 81,002.78-121,533.33-28,420.46

Finding the Fourth Proportional to 81,002.78, 121,533.33 and 28,420.46

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Solution

The fourth proportional to 81,002.78, 121,533.33 and 28,420.46 is: 42,640.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.78 : 121,533.33 = 28,420.46 : x
  2. Step 2: Convert to fraction form
    81,002.78/121,533.33 = 28,420.46/x
  3. Step 3: Cross multiply
    81,002.78x = 121,533.33 × 28,420.46
  4. Step 4: Simplify right side
    81,002.78x = 3,454,033,143.93
  5. Step 5: Solve for x
    x = 3,454,033,143.93/81,002.78
  6. Step 6: Final answer
    x = 42,640.92

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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.