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Finding the Fourth Proportional to 69,348, 104,039.28 and 20,100

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Solution

The fourth proportional to 69,348, 104,039.28 and 20,100 is: 30,155.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,348 : 104,039.28 = 20,100 : x
  2. Step 2: Convert to fraction form
    69,348/104,039.28 = 20,100/x
  3. Step 3: Cross multiply
    69,348x = 104,039.28 × 20,100
  4. Step 4: Simplify right side
    69,348x = 2,091,189,528
  5. Step 5: Solve for x
    x = 2,091,189,528/69,348
  6. Step 6: Final answer
    x = 30,155.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.