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Finding the Fourth Proportional to 78,969.53, 118,460.51 and 26,379.20

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Solution

The fourth proportional to 78,969.53, 118,460.51 and 26,379.20 is: 39,570.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,969.53 : 118,460.51 = 26,379.20 : x
  2. Step 2: Convert to fraction form
    78,969.53/118,460.51 = 26,379.20/x
  3. Step 3: Cross multiply
    78,969.53x = 118,460.51 × 26,379.20
  4. Step 4: Simplify right side
    78,969.53x = 3,124,892,761.19
  5. Step 5: Solve for x
    x = 3,124,892,761.19/78,969.53
  6. Step 6: Final answer
    x = 39,570.87

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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.