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Finding the Fourth Proportional to 71,388.81, 98,517.23 and 39,558.39

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Solution

The fourth proportional to 71,388.81, 98,517.23 and 39,558.39 is: 54,590.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,388.81 : 98,517.23 = 39,558.39 : x
  2. Step 2: Convert to fraction form
    71,388.81/98,517.23 = 39,558.39/x
  3. Step 3: Cross multiply
    71,388.81x = 98,517.23 × 39,558.39
  4. Step 4: Simplify right side
    71,388.81x = 3,897,182,808.27
  5. Step 5: Solve for x
    x = 3,897,182,808.27/71,388.81
  6. Step 6: Final answer
    x = 54,590.95

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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.