Home / 81,308.60-121,999.11-51,718.76

Finding the Fourth Proportional to 81,308.60, 121,999.11 and 51,718.76

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Solution

The fourth proportional to 81,308.60, 121,999.11 and 51,718.76 is: 77,601.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,308.60 : 121,999.11 = 51,718.76 : x
  2. Step 2: Convert to fraction form
    81,308.60/121,999.11 = 51,718.76/x
  3. Step 3: Cross multiply
    81,308.60x = 121,999.11 × 51,718.76
  4. Step 4: Simplify right side
    81,308.60x = 6,309,642,690.30
  5. Step 5: Solve for x
    x = 6,309,642,690.30/81,308.60
  6. Step 6: Final answer
    x = 77,601.17

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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.