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Finding the Fourth Proportional to 71,649.36, 98,868.60 and 39,813.12

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Solution

The fourth proportional to 71,649.36, 98,868.60 and 39,813.12 is: 54,937.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,649.36 : 98,868.60 = 39,813.12 : x
  2. Step 2: Convert to fraction form
    71,649.36/98,868.60 = 39,813.12/x
  3. Step 3: Cross multiply
    71,649.36x = 98,868.60 × 39,813.12
  4. Step 4: Simplify right side
    71,649.36x = 3,936,267,436.03
  5. Step 5: Solve for x
    x = 3,936,267,436.03/71,649.36
  6. Step 6: Final answer
    x = 54,937.93

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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.