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Finding the Fourth Proportional to 81,280.60, 121,775.10 and 69,616.60

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Solution

The fourth proportional to 81,280.60, 121,775.10 and 69,616.60 is: 104,300.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,280.60 : 121,775.10 = 69,616.60 : x
  2. Step 2: Convert to fraction form
    81,280.60/121,775.10 = 69,616.60/x
  3. Step 3: Cross multiply
    81,280.60x = 121,775.10 × 69,616.60
  4. Step 4: Simplify right side
    81,280.60x = 8,477,568,426.66
  5. Step 5: Solve for x
    x = 8,477,568,426.66/81,280.60
  6. Step 6: Final answer
    x = 104,300.02

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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.