Home / 81,442.87-121,607.25-72,954.57

Finding the Fourth Proportional to 81,442.87, 121,607.25 and 72,954.57

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Solution

The fourth proportional to 81,442.87, 121,607.25 and 72,954.57 is: 108,932.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,442.87 : 121,607.25 = 72,954.57 : x
  2. Step 2: Convert to fraction form
    81,442.87/121,607.25 = 72,954.57/x
  3. Step 3: Cross multiply
    81,442.87x = 121,607.25 × 72,954.57
  4. Step 4: Simplify right side
    81,442.87x = 8,871,804,632.63
  5. Step 5: Solve for x
    x = 8,871,804,632.63/81,442.87
  6. Step 6: Final answer
    x = 108,932.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.