Home / 78,984.88-118,372.20-38,942.74

Finding the Fourth Proportional to 78,984.88, 118,372.20 and 38,942.74

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Solution

The fourth proportional to 78,984.88, 118,372.20 and 38,942.74 is: 58,362.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,984.88 : 118,372.20 = 38,942.74 : x
  2. Step 2: Convert to fraction form
    78,984.88/118,372.20 = 38,942.74/x
  3. Step 3: Cross multiply
    78,984.88x = 118,372.20 × 38,942.74
  4. Step 4: Simplify right side
    78,984.88x = 4,609,737,807.83
  5. Step 5: Solve for x
    x = 4,609,737,807.83/78,984.88
  6. Step 6: Final answer
    x = 58,362.28

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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.