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Finding the Fourth Proportional to 100,391.59, 138,537.86 and 57,368.34

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Solution

The fourth proportional to 100,391.59, 138,537.86 and 57,368.34 is: 79,166.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,391.59 : 138,537.86 = 57,368.34 : x
  2. Step 2: Convert to fraction form
    100,391.59/138,537.86 = 57,368.34/x
  3. Step 3: Cross multiply
    100,391.59x = 138,537.86 × 57,368.34
  4. Step 4: Simplify right side
    100,391.59x = 7,947,687,652.06
  5. Step 5: Solve for x
    x = 7,947,687,652.06/100,391.59
  6. Step 6: Final answer
    x = 79,166.87

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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.