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Finding the Fourth Proportional to 126,693.72, 189,979.06 and 47,814.08

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Solution

The fourth proportional to 126,693.72, 189,979.06 and 47,814.08 is: 71,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,693.72 : 189,979.06 = 47,814.08 : x
  2. Step 2: Convert to fraction form
    126,693.72/189,979.06 = 47,814.08/x
  3. Step 3: Cross multiply
    126,693.72x = 189,979.06 × 47,814.08
  4. Step 4: Simplify right side
    126,693.72x = 9,083,673,973.16
  5. Step 5: Solve for x
    x = 9,083,673,973.16/126,693.72
  6. Step 6: Final answer
    x = 71,697.90

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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.