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Finding the Fourth Proportional to 71,142.75, 98,168.49 and 39,307.32

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Solution

The fourth proportional to 71,142.75, 98,168.49 and 39,307.32 is: 54,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,142.75 : 98,168.49 = 39,307.32 : x
  2. Step 2: Convert to fraction form
    71,142.75/98,168.49 = 39,307.32/x
  3. Step 3: Cross multiply
    71,142.75x = 98,168.49 × 39,307.32
  4. Step 4: Simplify right side
    71,142.75x = 3,858,740,250.35
  5. Step 5: Solve for x
    x = 3,858,740,250.35/71,142.75
  6. Step 6: Final answer
    x = 54,239.40

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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.