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Finding the Fourth Proportional to 85,987.99, 118,661.74 and 47,745.57

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Solution

The fourth proportional to 85,987.99, 118,661.74 and 47,745.57 is: 65,887.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,987.99 : 118,661.74 = 47,745.57 : x
  2. Step 2: Convert to fraction form
    85,987.99/118,661.74 = 47,745.57/x
  3. Step 3: Cross multiply
    85,987.99x = 118,661.74 × 47,745.57
  4. Step 4: Simplify right side
    85,987.99x = 5,665,572,413.49
  5. Step 5: Solve for x
    x = 5,665,572,413.49/85,987.99
  6. Step 6: Final answer
    x = 65,887.95

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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.