Home / 81,742.74-122,541.46-31,811.16

Finding the Fourth Proportional to 81,742.74, 122,541.46 and 31,811.16

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Solution

The fourth proportional to 81,742.74, 122,541.46 and 31,811.16 is: 47,688.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,742.74 : 122,541.46 = 31,811.16 : x
  2. Step 2: Convert to fraction form
    81,742.74/122,541.46 = 31,811.16/x
  3. Step 3: Cross multiply
    81,742.74x = 122,541.46 × 31,811.16
  4. Step 4: Simplify right side
    81,742.74x = 3,898,186,370.70
  5. Step 5: Solve for x
    x = 3,898,186,370.70/81,742.74
  6. Step 6: Final answer
    x = 47,688.47

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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.