Home / 149,220.60-205,920.54-81,238.92

Finding the Fourth Proportional to 149,220.60, 205,920.54 and 81,238.92

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Solution

The fourth proportional to 149,220.60, 205,920.54 and 81,238.92 is: 112,107.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,220.60 : 205,920.54 = 81,238.92 : x
  2. Step 2: Convert to fraction form
    149,220.60/205,920.54 = 81,238.92/x
  3. Step 3: Cross multiply
    149,220.60x = 205,920.54 × 81,238.92
  4. Step 4: Simplify right side
    149,220.60x = 16,728,762,275.42
  5. Step 5: Solve for x
    x = 16,728,762,275.42/149,220.60
  6. Step 6: Final answer
    x = 112,107.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.