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Finding the Fourth Proportional to 85,638.76, 118,181.70 and 47,400.94

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Solution

The fourth proportional to 85,638.76, 118,181.70 and 47,400.94 is: 65,413.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,638.76 : 118,181.70 = 47,400.94 : x
  2. Step 2: Convert to fraction form
    85,638.76/118,181.70 = 47,400.94/x
  3. Step 3: Cross multiply
    85,638.76x = 118,181.70 × 47,400.94
  4. Step 4: Simplify right side
    85,638.76x = 5,601,923,670.80
  5. Step 5: Solve for x
    x = 5,601,923,670.80/85,638.76
  6. Step 6: Final answer
    x = 65,413.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.