Home / 81,655.54-122,451.68-31,729.02

Finding the Fourth Proportional to 81,655.54, 122,451.68 and 31,729.02

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Solution

The fourth proportional to 81,655.54, 122,451.68 and 31,729.02 is: 47,581.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,655.54 : 122,451.68 = 31,729.02 : x
  2. Step 2: Convert to fraction form
    81,655.54/122,451.68 = 31,729.02/x
  3. Step 3: Cross multiply
    81,655.54x = 122,451.68 × 31,729.02
  4. Step 4: Simplify right side
    81,655.54x = 3,885,271,803.75
  5. Step 5: Solve for x
    x = 3,885,271,803.75/81,655.54
  6. Step 6: Final answer
    x = 47,581.24

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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.