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Finding the Fourth Proportional to 100,366.34, 138,495.57 and 57,938.54

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Solution

The fourth proportional to 100,366.34, 138,495.57 and 57,938.54 is: 79,949.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,366.34 : 138,495.57 = 57,938.54 : x
  2. Step 2: Convert to fraction form
    100,366.34/138,495.57 = 57,938.54/x
  3. Step 3: Cross multiply
    100,366.34x = 138,495.57 × 57,938.54
  4. Step 4: Simplify right side
    100,366.34x = 8,024,231,122.27
  5. Step 5: Solve for x
    x = 8,024,231,122.27/100,366.34
  6. Step 6: Final answer
    x = 79,949.42

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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.