Home / 81,892.40-122,812.47-31,960.35

Finding the Fourth Proportional to 81,892.40, 122,812.47 and 31,960.35

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Solution

The fourth proportional to 81,892.40, 122,812.47 and 31,960.35 is: 47,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,892.40 : 122,812.47 = 31,960.35 : x
  2. Step 2: Convert to fraction form
    81,892.40/122,812.47 = 31,960.35/x
  3. Step 3: Cross multiply
    81,892.40x = 122,812.47 × 31,960.35
  4. Step 4: Simplify right side
    81,892.40x = 3,925,129,525.56
  5. Step 5: Solve for x
    x = 3,925,129,525.56/81,892.40
  6. Step 6: Final answer
    x = 47,930.33

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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.