Home / 81,201.48-121,800.76-31,292.40

Finding the Fourth Proportional to 81,201.48, 121,800.76 and 31,292.40

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Solution

The fourth proportional to 81,201.48, 121,800.76 and 31,292.40 is: 46,938.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,201.48 : 121,800.76 = 31,292.40 : x
  2. Step 2: Convert to fraction form
    81,201.48/121,800.76 = 31,292.40/x
  3. Step 3: Cross multiply
    81,201.48x = 121,800.76 × 31,292.40
  4. Step 4: Simplify right side
    81,201.48x = 3,811,438,102.22
  5. Step 5: Solve for x
    x = 3,811,438,102.22/81,201.48
  6. Step 6: Final answer
    x = 46,938.04

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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.