Home / 81,002.50-121,506.84-31,087.64

Finding the Fourth Proportional to 81,002.50, 121,506.84 and 31,087.64

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Solution

The fourth proportional to 81,002.50, 121,506.84 and 31,087.64 is: 46,632.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.50 : 121,506.84 = 31,087.64 : x
  2. Step 2: Convert to fraction form
    81,002.50/121,506.84 = 31,087.64/x
  3. Step 3: Cross multiply
    81,002.50x = 121,506.84 × 31,087.64
  4. Step 4: Simplify right side
    81,002.50x = 3,777,361,203.22
  5. Step 5: Solve for x
    x = 3,777,361,203.22/81,002.50
  6. Step 6: Final answer
    x = 46,632.65

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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.