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Finding the Fourth Proportional to 65,563.81, 90,519.45 and 45,413.44

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Solution

The fourth proportional to 65,563.81, 90,519.45 and 45,413.44 is: 62,699.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,563.81 : 90,519.45 = 45,413.44 : x
  2. Step 2: Convert to fraction form
    65,563.81/90,519.45 = 45,413.44/x
  3. Step 3: Cross multiply
    65,563.81x = 90,519.45 × 45,413.44
  4. Step 4: Simplify right side
    65,563.81x = 4,110,799,611.41
  5. Step 5: Solve for x
    x = 4,110,799,611.41/65,563.81
  6. Step 6: Final answer
    x = 62,699.22

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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.