Home / 103,660.32-143,272.20-91,374.24

Finding the Fourth Proportional to 103,660.32, 143,272.20 and 91,374.24

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Solution

The fourth proportional to 103,660.32, 143,272.20 and 91,374.24 is: 126,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,660.32 : 143,272.20 = 91,374.24 : x
  2. Step 2: Convert to fraction form
    103,660.32/143,272.20 = 91,374.24/x
  3. Step 3: Cross multiply
    103,660.32x = 143,272.20 × 91,374.24
  4. Step 4: Simplify right side
    103,660.32x = 13,091,388,388.13
  5. Step 5: Solve for x
    x = 13,091,388,388.13/103,660.32
  6. Step 6: Final answer
    x = 126,291.22

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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.