Home / 120,136.83-165,785.90-66,420.46

Finding the Fourth Proportional to 120,136.83, 165,785.90 and 66,420.46

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Solution

The fourth proportional to 120,136.83, 165,785.90 and 66,420.46 is: 91,658.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,136.83 : 165,785.90 = 66,420.46 : x
  2. Step 2: Convert to fraction form
    120,136.83/165,785.90 = 66,420.46/x
  3. Step 3: Cross multiply
    120,136.83x = 165,785.90 × 66,420.46
  4. Step 4: Simplify right side
    120,136.83x = 11,011,575,739.51
  5. Step 5: Solve for x
    x = 11,011,575,739.51/120,136.83
  6. Step 6: Final answer
    x = 91,658.62

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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.