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Finding the Fourth Proportional to 100,172.99, 138,232.63 and 54,851.51

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Solution

The fourth proportional to 100,172.99, 138,232.63 and 54,851.51 is: 75,691.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,172.99 : 138,232.63 = 54,851.51 : x
  2. Step 2: Convert to fraction form
    100,172.99/138,232.63 = 54,851.51/x
  3. Step 3: Cross multiply
    100,172.99x = 138,232.63 × 54,851.51
  4. Step 4: Simplify right side
    100,172.99x = 7,582,268,592.38
  5. Step 5: Solve for x
    x = 7,582,268,592.38/100,172.99
  6. Step 6: Final answer
    x = 75,691.75

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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.