Home / 159,153.40-219,621-91,170.64

Finding the Fourth Proportional to 159,153.40, 219,621 and 91,170.64

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Solution

The fourth proportional to 159,153.40, 219,621 and 91,170.64 is: 125,809.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,153.40 : 219,621 = 91,170.64 : x
  2. Step 2: Convert to fraction form
    159,153.40/219,621 = 91,170.64/x
  3. Step 3: Cross multiply
    159,153.40x = 219,621 × 91,170.64
  4. Step 4: Simplify right side
    159,153.40x = 20,022,987,127.44
  5. Step 5: Solve for x
    x = 20,022,987,127.44/159,153.40
  6. Step 6: Final answer
    x = 125,809.36

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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.