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Finding the Fourth Proportional to 78,175.20, 117,219.60 and 25,557.60

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Solution

The fourth proportional to 78,175.20, 117,219.60 and 25,557.60 is: 38,322.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,175.20 : 117,219.60 = 25,557.60 : x
  2. Step 2: Convert to fraction form
    78,175.20/117,219.60 = 25,557.60/x
  3. Step 3: Cross multiply
    78,175.20x = 117,219.60 × 25,557.60
  4. Step 4: Simplify right side
    78,175.20x = 2,995,851,648.96
  5. Step 5: Solve for x
    x = 2,995,851,648.96/78,175.20
  6. Step 6: Final answer
    x = 38,322.28

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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.