Home / 81,003.50-121,508.34-31,088.64

Finding the Fourth Proportional to 81,003.50, 121,508.34 and 31,088.64

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Solution

The fourth proportional to 81,003.50, 121,508.34 and 31,088.64 is: 46,634.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,003.50 : 121,508.34 = 31,088.64 : x
  2. Step 2: Convert to fraction form
    81,003.50/121,508.34 = 31,088.64/x
  3. Step 3: Cross multiply
    81,003.50x = 121,508.34 × 31,088.64
  4. Step 4: Simplify right side
    81,003.50x = 3,777,529,039.26
  5. Step 5: Solve for x
    x = 3,777,529,039.26/81,003.50
  6. Step 6: Final answer
    x = 46,634.15

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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.