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Finding the Fourth Proportional to 236,717.66, 355,077.86 and 78,945.66

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Solution

The fourth proportional to 236,717.66, 355,077.86 and 78,945.66 is: 118,418.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,717.66 : 355,077.86 = 78,945.66 : x
  2. Step 2: Convert to fraction form
    236,717.66/355,077.86 = 78,945.66/x
  3. Step 3: Cross multiply
    236,717.66x = 355,077.86 × 78,945.66
  4. Step 4: Simplify right side
    236,717.66x = 28,031,855,614.36
  5. Step 5: Solve for x
    x = 28,031,855,614.36/236,717.66
  6. Step 6: Final answer
    x = 118,418.94

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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.