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Finding the Fourth Proportional to 71,175, 98,220.78 and 39,342.36

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Solution

The fourth proportional to 71,175, 98,220.78 and 39,342.36 is: 54,292.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,175 : 98,220.78 = 39,342.36 : x
  2. Step 2: Convert to fraction form
    71,175/98,220.78 = 39,342.36/x
  3. Step 3: Cross multiply
    71,175x = 98,220.78 × 39,342.36
  4. Step 4: Simplify right side
    71,175x = 3,864,237,286.24
  5. Step 5: Solve for x
    x = 3,864,237,286.24/71,175
  6. Step 6: Final answer
    x = 54,292.06

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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.