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Finding the Fourth Proportional to 71,172.81, 98,218.51 and 38,907.57

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Solution

The fourth proportional to 71,172.81, 98,218.51 and 38,907.57 is: 53,692.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,172.81 : 98,218.51 = 38,907.57 : x
  2. Step 2: Convert to fraction form
    71,172.81/98,218.51 = 38,907.57/x
  3. Step 3: Cross multiply
    71,172.81x = 98,218.51 × 38,907.57
  4. Step 4: Simplify right side
    71,172.81x = 3,821,443,824.17
  5. Step 5: Solve for x
    x = 3,821,443,824.17/71,172.81
  6. Step 6: Final answer
    x = 53,692.47

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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.