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Finding the Fourth Proportional to 142,698.78, 196,745.22 and 91,621.26

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Solution

The fourth proportional to 142,698.78, 196,745.22 and 91,621.26 is: 126,322.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,698.78 : 196,745.22 = 91,621.26 : x
  2. Step 2: Convert to fraction form
    142,698.78/196,745.22 = 91,621.26/x
  3. Step 3: Cross multiply
    142,698.78x = 196,745.22 × 91,621.26
  4. Step 4: Simplify right side
    142,698.78x = 18,026,044,955.38
  5. Step 5: Solve for x
    x = 18,026,044,955.38/142,698.78
  6. Step 6: Final answer
    x = 126,322.35

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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.