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Finding the Fourth Proportional to 57,811.40, 86,717.10 and 44,689.40

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Solution

The fourth proportional to 57,811.40, 86,717.10 and 44,689.40 is: 67,034.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,811.40 : 86,717.10 = 44,689.40 : x
  2. Step 2: Convert to fraction form
    57,811.40/86,717.10 = 44,689.40/x
  3. Step 3: Cross multiply
    57,811.40x = 86,717.10 × 44,689.40
  4. Step 4: Simplify right side
    57,811.40x = 3,875,335,168.74
  5. Step 5: Solve for x
    x = 3,875,335,168.74/57,811.40
  6. Step 6: Final answer
    x = 67,034.10

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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.