Home / 142,175.64-196,198.56-78,512.08

Finding the Fourth Proportional to 142,175.64, 196,198.56 and 78,512.08

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Solution

The fourth proportional to 142,175.64, 196,198.56 and 78,512.08 is: 108,344.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,175.64 : 196,198.56 = 78,512.08 : x
  2. Step 2: Convert to fraction form
    142,175.64/196,198.56 = 78,512.08/x
  3. Step 3: Cross multiply
    142,175.64x = 196,198.56 × 78,512.08
  4. Step 4: Simplify right side
    142,175.64x = 15,403,957,038.60
  5. Step 5: Solve for x
    x = 15,403,957,038.60/142,175.64
  6. Step 6: Final answer
    x = 108,344.56

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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.