Home / 100,156.02-138,231.53-57,136.52

Finding the Fourth Proportional to 100,156.02, 138,231.53 and 57,136.52

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Solution

The fourth proportional to 100,156.02, 138,231.53 and 57,136.52 is: 78,857.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,156.02 : 138,231.53 = 57,136.52 : x
  2. Step 2: Convert to fraction form
    100,156.02/138,231.53 = 57,136.52/x
  3. Step 3: Cross multiply
    100,156.02x = 138,231.53 × 57,136.52
  4. Step 4: Simplify right side
    100,156.02x = 7,898,067,601.64
  5. Step 5: Solve for x
    x = 7,898,067,601.64/100,156.02
  6. Step 6: Final answer
    x = 78,857.64

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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.