Home / 120,136.32-165,786.90-66,421.14

Finding the Fourth Proportional to 120,136.32, 165,786.90 and 66,421.14

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Solution

The fourth proportional to 120,136.32, 165,786.90 and 66,421.14 is: 91,660.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,136.32 : 165,786.90 = 66,421.14 : x
  2. Step 2: Convert to fraction form
    120,136.32/165,786.90 = 66,421.14/x
  3. Step 3: Cross multiply
    120,136.32x = 165,786.90 × 66,421.14
  4. Step 4: Simplify right side
    120,136.32x = 11,011,754,895.07
  5. Step 5: Solve for x
    x = 11,011,754,895.07/120,136.32
  6. Step 6: Final answer
    x = 91,660.50

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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.