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Finding the Fourth Proportional to 253,693.08, 380,509.38 and 66,719.16

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Solution

The fourth proportional to 253,693.08, 380,509.38 and 66,719.16 is: 100,070.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,693.08 : 380,509.38 = 66,719.16 : x
  2. Step 2: Convert to fraction form
    253,693.08/380,509.38 = 66,719.16/x
  3. Step 3: Cross multiply
    253,693.08x = 380,509.38 × 66,719.16
  4. Step 4: Simplify right side
    253,693.08x = 25,387,266,205.72
  5. Step 5: Solve for x
    x = 25,387,266,205.72/253,693.08
  6. Step 6: Final answer
    x = 100,070.79

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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.