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Finding the Fourth Proportional to 71,168.88, 98,211.34 and 38,902.06

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Solution

The fourth proportional to 71,168.88, 98,211.34 and 38,902.06 is: 53,683.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,168.88 : 98,211.34 = 38,902.06 : x
  2. Step 2: Convert to fraction form
    71,168.88/98,211.34 = 38,902.06/x
  3. Step 3: Cross multiply
    71,168.88x = 98,211.34 × 38,902.06
  4. Step 4: Simplify right side
    71,168.88x = 3,820,623,441.36
  5. Step 5: Solve for x
    x = 3,820,623,441.36/71,168.88
  6. Step 6: Final answer
    x = 53,683.91

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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.