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Finding the Fourth Proportional to 78,269.66, 117,256.86 and 60,653.37

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Solution

The fourth proportional to 78,269.66, 117,256.86 and 60,653.37 is: 90,865.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,269.66 : 117,256.86 = 60,653.37 : x
  2. Step 2: Convert to fraction form
    78,269.66/117,256.86 = 60,653.37/x
  3. Step 3: Cross multiply
    78,269.66x = 117,256.86 × 60,653.37
  4. Step 4: Simplify right side
    78,269.66x = 7,112,023,714.62
  5. Step 5: Solve for x
    x = 7,112,023,714.62/78,269.66
  6. Step 6: Final answer
    x = 90,865.66

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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.