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Finding the Fourth Proportional to 78,745.77, 118,001.97 and 64,804.86

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Solution

The fourth proportional to 78,745.77, 118,001.97 and 64,804.86 is: 97,111.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,745.77 : 118,001.97 = 64,804.86 : x
  2. Step 2: Convert to fraction form
    78,745.77/118,001.97 = 64,804.86/x
  3. Step 3: Cross multiply
    78,745.77x = 118,001.97 × 64,804.86
  4. Step 4: Simplify right side
    78,745.77x = 7,647,101,145.57
  5. Step 5: Solve for x
    x = 7,647,101,145.57/78,745.77
  6. Step 6: Final answer
    x = 97,111.26

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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.