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Finding the Fourth Proportional to 67,111.80, 100,581.30 and 51,451.80

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Solution

The fourth proportional to 67,111.80, 100,581.30 and 51,451.80 is: 77,111.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,111.80 : 100,581.30 = 51,451.80 : x
  2. Step 2: Convert to fraction form
    67,111.80/100,581.30 = 51,451.80/x
  3. Step 3: Cross multiply
    67,111.80x = 100,581.30 × 51,451.80
  4. Step 4: Simplify right side
    67,111.80x = 5,175,088,931.34
  5. Step 5: Solve for x
    x = 5,175,088,931.34/67,111.80
  6. Step 6: Final answer
    x = 77,111.46

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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.