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Finding the Fourth Proportional to 100,015.02, 138,020.72 and 54,693.04

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Solution

The fourth proportional to 100,015.02, 138,020.72 and 54,693.04 is: 75,476.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,015.02 : 138,020.72 = 54,693.04 : x
  2. Step 2: Convert to fraction form
    100,015.02/138,020.72 = 54,693.04/x
  3. Step 3: Cross multiply
    100,015.02x = 138,020.72 × 54,693.04
  4. Step 4: Simplify right side
    100,015.02x = 7,548,772,551.47
  5. Step 5: Solve for x
    x = 7,548,772,551.47/100,015.02
  6. Step 6: Final answer
    x = 75,476.39

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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.