Home / 65,515.23-90,413.01-38,680.74

Finding the Fourth Proportional to 65,515.23, 90,413.01 and 38,680.74

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Solution

The fourth proportional to 65,515.23, 90,413.01 and 38,680.74 is: 53,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,515.23 : 90,413.01 = 38,680.74 : x
  2. Step 2: Convert to fraction form
    65,515.23/90,413.01 = 38,680.74/x
  3. Step 3: Cross multiply
    65,515.23x = 90,413.01 × 38,680.74
  4. Step 4: Simplify right side
    65,515.23x = 3,497,242,132.43
  5. Step 5: Solve for x
    x = 3,497,242,132.43/65,515.23
  6. Step 6: Final answer
    x = 53,380.60

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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.