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Finding the Fourth Proportional to 100,333.84, 138,466.92 and 55,621.84

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Solution

The fourth proportional to 100,333.84, 138,466.92 and 55,621.84 is: 76,761.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,333.84 : 138,466.92 = 55,621.84 : x
  2. Step 2: Convert to fraction form
    100,333.84/138,466.92 = 55,621.84/x
  3. Step 3: Cross multiply
    100,333.84x = 138,466.92 × 55,621.84
  4. Step 4: Simplify right side
    100,333.84x = 7,701,784,869.53
  5. Step 5: Solve for x
    x = 7,701,784,869.53/100,333.84
  6. Step 6: Final answer
    x = 76,761.59

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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.