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Finding the Fourth Proportional to 315,451.50, 473,174.60 and 78,792.58

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Solution

The fourth proportional to 315,451.50, 473,174.60 and 78,792.58 is: 118,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,451.50 : 473,174.60 = 78,792.58 : x
  2. Step 2: Convert to fraction form
    315,451.50/473,174.60 = 78,792.58/x
  3. Step 3: Cross multiply
    315,451.50x = 473,174.60 × 78,792.58
  4. Step 4: Simplify right side
    315,451.50x = 37,282,647,524.47
  5. Step 5: Solve for x
    x = 37,282,647,524.47/315,451.50
  6. Step 6: Final answer
    x = 118,188.21

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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.