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Finding the Fourth Proportional to 71,155.53, 98,194.94 and 38,890.80

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Solution

The fourth proportional to 71,155.53, 98,194.94 and 38,890.80 is: 53,669.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,155.53 : 98,194.94 = 38,890.80 : x
  2. Step 2: Convert to fraction form
    71,155.53/98,194.94 = 38,890.80/x
  3. Step 3: Cross multiply
    71,155.53x = 98,194.94 × 38,890.80
  4. Step 4: Simplify right side
    71,155.53x = 3,818,879,578.10
  5. Step 5: Solve for x
    x = 3,818,879,578.10/71,155.53
  6. Step 6: Final answer
    x = 53,669.47

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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.