Home / 81,220.28-121,798.12-31,272.72

Finding the Fourth Proportional to 81,220.28, 121,798.12 and 31,272.72

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Solution

The fourth proportional to 81,220.28, 121,798.12 and 31,272.72 is: 46,896.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.28 : 121,798.12 = 31,272.72 : x
  2. Step 2: Convert to fraction form
    81,220.28/121,798.12 = 31,272.72/x
  3. Step 3: Cross multiply
    81,220.28x = 121,798.12 × 31,272.72
  4. Step 4: Simplify right side
    81,220.28x = 3,808,958,503.29
  5. Step 5: Solve for x
    x = 3,808,958,503.29/81,220.28
  6. Step 6: Final answer
    x = 46,896.64

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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.