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Finding the Fourth Proportional to 86,175.60, 129,220.20 and 39,375.60

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Solution

The fourth proportional to 86,175.60, 129,220.20 and 39,375.60 is: 59,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,175.60 : 129,220.20 = 39,375.60 : x
  2. Step 2: Convert to fraction form
    86,175.60/129,220.20 = 39,375.60/x
  3. Step 3: Cross multiply
    86,175.60x = 129,220.20 × 39,375.60
  4. Step 4: Simplify right side
    86,175.60x = 5,088,122,907.12
  5. Step 5: Solve for x
    x = 5,088,122,907.12/86,175.60
  6. Step 6: Final answer
    x = 59,043.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.