Home / 81,231.16-121,551.30-67,059.40

Finding the Fourth Proportional to 81,231.16, 121,551.30 and 67,059.40

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Solution

The fourth proportional to 81,231.16, 121,551.30 and 67,059.40 is: 100,345.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.16 : 121,551.30 = 67,059.40 : x
  2. Step 2: Convert to fraction form
    81,231.16/121,551.30 = 67,059.40/x
  3. Step 3: Cross multiply
    81,231.16x = 121,551.30 × 67,059.40
  4. Step 4: Simplify right side
    81,231.16x = 8,151,157,247.22
  5. Step 5: Solve for x
    x = 8,151,157,247.22/81,231.16
  6. Step 6: Final answer
    x = 100,345.20

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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.