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Finding the Fourth Proportional to 228,435.39, 342,676.03 and 78,655.86

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Solution

The fourth proportional to 228,435.39, 342,676.03 and 78,655.86 is: 117,991.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,435.39 : 342,676.03 = 78,655.86 : x
  2. Step 2: Convert to fraction form
    228,435.39/342,676.03 = 78,655.86/x
  3. Step 3: Cross multiply
    228,435.39x = 342,676.03 × 78,655.86
  4. Step 4: Simplify right side
    228,435.39x = 26,953,476,654.32
  5. Step 5: Solve for x
    x = 26,953,476,654.32/228,435.39
  6. Step 6: Final answer
    x = 117,991.69

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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.