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Finding the Fourth Proportional to 131,384.76, 181,144.92 and 85,990.74

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Solution

The fourth proportional to 131,384.76, 181,144.92 and 85,990.74 is: 118,558.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,384.76 : 181,144.92 = 85,990.74 : x
  2. Step 2: Convert to fraction form
    131,384.76/181,144.92 = 85,990.74/x
  3. Step 3: Cross multiply
    131,384.76x = 181,144.92 × 85,990.74
  4. Step 4: Simplify right side
    131,384.76x = 15,576,785,718.04
  5. Step 5: Solve for x
    x = 15,576,785,718.04/131,384.76
  6. Step 6: Final answer
    x = 118,558.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.