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Finding the Fourth Proportional to 76,851, 115,176.04 and 39,379.32

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Solution

The fourth proportional to 76,851, 115,176.04 and 39,379.32 is: 59,017.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,851 : 115,176.04 = 39,379.32 : x
  2. Step 2: Convert to fraction form
    76,851/115,176.04 = 39,379.32/x
  3. Step 3: Cross multiply
    76,851x = 115,176.04 × 39,379.32
  4. Step 4: Simplify right side
    76,851x = 4,535,554,135.49
  5. Step 5: Solve for x
    x = 4,535,554,135.49/76,851
  6. Step 6: Final answer
    x = 59,017.50

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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.