Home / 81,045.63-121,555.89-31,149.09

Finding the Fourth Proportional to 81,045.63, 121,555.89 and 31,149.09

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Solution

The fourth proportional to 81,045.63, 121,555.89 and 31,149.09 is: 46,718.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.63 : 121,555.89 = 31,149.09 : x
  2. Step 2: Convert to fraction form
    81,045.63/121,555.89 = 31,149.09/x
  3. Step 3: Cross multiply
    81,045.63x = 121,555.89 × 31,149.09
  4. Step 4: Simplify right side
    81,045.63x = 3,786,355,357.64
  5. Step 5: Solve for x
    x = 3,786,355,357.64/81,045.63
  6. Step 6: Final answer
    x = 46,718.81

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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.