Home / 81,807.45-122,660.91-31,829.34

Finding the Fourth Proportional to 81,807.45, 122,660.91 and 31,829.34

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Solution

The fourth proportional to 81,807.45, 122,660.91 and 31,829.34 is: 47,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,807.45 : 122,660.91 = 31,829.34 : x
  2. Step 2: Convert to fraction form
    81,807.45/122,660.91 = 31,829.34/x
  3. Step 3: Cross multiply
    81,807.45x = 122,660.91 × 31,829.34
  4. Step 4: Simplify right side
    81,807.45x = 3,904,215,809.10
  5. Step 5: Solve for x
    x = 3,904,215,809.10/81,807.45
  6. Step 6: Final answer
    x = 47,724.45

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1.5x scale

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.