Home / 78,717.34-118,076.54-28,776.90

Finding the Fourth Proportional to 78,717.34, 118,076.54 and 28,776.90

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Solution

The fourth proportional to 78,717.34, 118,076.54 and 28,776.90 is: 43,165.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,717.34 : 118,076.54 = 28,776.90 : x
  2. Step 2: Convert to fraction form
    78,717.34/118,076.54 = 28,776.90/x
  3. Step 3: Cross multiply
    78,717.34x = 118,076.54 × 28,776.90
  4. Step 4: Simplify right side
    78,717.34x = 3,397,876,783.93
  5. Step 5: Solve for x
    x = 3,397,876,783.93/78,717.34
  6. Step 6: Final answer
    x = 43,165.54

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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.