Home / 76,136.90-105,067.64-42,144.65

Finding the Fourth Proportional to 76,136.90, 105,067.64 and 42,144.65

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Solution

The fourth proportional to 76,136.90, 105,067.64 and 42,144.65 is: 58,158.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,136.90 : 105,067.64 = 42,144.65 : x
  2. Step 2: Convert to fraction form
    76,136.90/105,067.64 = 42,144.65/x
  3. Step 3: Cross multiply
    76,136.90x = 105,067.64 × 42,144.65
  4. Step 4: Simplify right side
    76,136.90x = 4,428,039,124.11
  5. Step 5: Solve for x
    x = 4,428,039,124.11/76,136.90
  6. Step 6: Final answer
    x = 58,158.91

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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.