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Finding the Fourth Proportional to 98,379.63, 135,746.94 and 55,353.15

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Solution

The fourth proportional to 98,379.63, 135,746.94 and 55,353.15 is: 76,377.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,379.63 : 135,746.94 = 55,353.15 : x
  2. Step 2: Convert to fraction form
    98,379.63/135,746.94 = 55,353.15/x
  3. Step 3: Cross multiply
    98,379.63x = 135,746.94 × 55,353.15
  4. Step 4: Simplify right side
    98,379.63x = 7,514,020,731.86
  5. Step 5: Solve for x
    x = 7,514,020,731.86/98,379.63
  6. Step 6: Final answer
    x = 76,377.81

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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.