Home / 81,901.23-122,870.27-31,995.56

Finding the Fourth Proportional to 81,901.23, 122,870.27 and 31,995.56

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Solution

The fourth proportional to 81,901.23, 122,870.27 and 31,995.56 is: 48,000.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,901.23 : 122,870.27 = 31,995.56 : x
  2. Step 2: Convert to fraction form
    81,901.23/122,870.27 = 31,995.56/x
  3. Step 3: Cross multiply
    81,901.23x = 122,870.27 × 31,995.56
  4. Step 4: Simplify right side
    81,901.23x = 3,931,302,612.05
  5. Step 5: Solve for x
    x = 3,931,302,612.05/81,901.23
  6. Step 6: Final answer
    x = 48,000.53

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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.