Home / 81,103.55-121,655.33-31,207.15

Finding the Fourth Proportional to 81,103.55, 121,655.33 and 31,207.15

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Solution

The fourth proportional to 81,103.55, 121,655.33 and 31,207.15 is: 46,810.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,103.55 : 121,655.33 = 31,207.15 : x
  2. Step 2: Convert to fraction form
    81,103.55/121,655.33 = 31,207.15/x
  3. Step 3: Cross multiply
    81,103.55x = 121,655.33 × 31,207.15
  4. Step 4: Simplify right side
    81,103.55x = 3,796,515,905.49
  5. Step 5: Solve for x
    x = 3,796,515,905.49/81,103.55
  6. Step 6: Final answer
    x = 46,810.72

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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.