Home / 81,136.32-121,690.44-21,958.17

Finding the Fourth Proportional to 81,136.32, 121,690.44 and 21,958.17

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Solution

The fourth proportional to 81,136.32, 121,690.44 and 21,958.17 is: 32,933.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,136.32 : 121,690.44 = 21,958.17 : x
  2. Step 2: Convert to fraction form
    81,136.32/121,690.44 = 21,958.17/x
  3. Step 3: Cross multiply
    81,136.32x = 121,690.44 × 21,958.17
  4. Step 4: Simplify right side
    81,136.32x = 2,672,099,368.89
  5. Step 5: Solve for x
    x = 2,672,099,368.89/81,136.32
  6. Step 6: Final answer
    x = 32,933.46

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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.