Home / 78,704.20-118,085.10-31,961.80

Finding the Fourth Proportional to 78,704.20, 118,085.10 and 31,961.80

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Solution

The fourth proportional to 78,704.20, 118,085.10 and 31,961.80 is: 47,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,704.20 : 118,085.10 = 31,961.80 : x
  2. Step 2: Convert to fraction form
    78,704.20/118,085.10 = 31,961.80/x
  3. Step 3: Cross multiply
    78,704.20x = 118,085.10 × 31,961.80
  4. Step 4: Simplify right side
    78,704.20x = 3,774,212,349.18
  5. Step 5: Solve for x
    x = 3,774,212,349.18/78,704.20
  6. Step 6: Final answer
    x = 47,954.40

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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.