Home / 81,166.32-121,812.66-53,078.76

Finding the Fourth Proportional to 81,166.32, 121,812.66 and 53,078.76

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Solution

The fourth proportional to 81,166.32, 121,812.66 and 53,078.76 is: 79,659.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,166.32 : 121,812.66 = 53,078.76 : x
  2. Step 2: Convert to fraction form
    81,166.32/121,812.66 = 53,078.76/x
  3. Step 3: Cross multiply
    81,166.32x = 121,812.66 × 53,078.76
  4. Step 4: Simplify right side
    81,166.32x = 6,465,664,945.10
  5. Step 5: Solve for x
    x = 6,465,664,945.10/81,166.32
  6. Step 6: Final answer
    x = 79,659.46

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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.