Home / 81,327.30-121,753.35-57,999.30

Finding the Fourth Proportional to 81,327.30, 121,753.35 and 57,999.30

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Solution

The fourth proportional to 81,327.30, 121,753.35 and 57,999.30 is: 86,829.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,327.30 : 121,753.35 = 57,999.30 : x
  2. Step 2: Convert to fraction form
    81,327.30/121,753.35 = 57,999.30/x
  3. Step 3: Cross multiply
    81,327.30x = 121,753.35 × 57,999.30
  4. Step 4: Simplify right side
    81,327.30x = 7,061,609,072.66
  5. Step 5: Solve for x
    x = 7,061,609,072.66/81,327.30
  6. Step 6: Final answer
    x = 86,829.50

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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.