Home / 81,273.36-121,877.64-31,325.76

Finding the Fourth Proportional to 81,273.36, 121,877.64 and 31,325.76

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Solution

The fourth proportional to 81,273.36, 121,877.64 and 31,325.76 is: 46,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,273.36 : 121,877.64 = 31,325.76 : x
  2. Step 2: Convert to fraction form
    81,273.36/121,877.64 = 31,325.76/x
  3. Step 3: Cross multiply
    81,273.36x = 121,877.64 × 31,325.76
  4. Step 4: Simplify right side
    81,273.36x = 3,817,909,700.01
  5. Step 5: Solve for x
    x = 3,817,909,700.01/81,273.36
  6. Step 6: Final answer
    x = 46,976.15

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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.