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Finding the Fourth Proportional to 72,704.16, 100,334.16 and 40,878.72

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Solution

The fourth proportional to 72,704.16, 100,334.16 and 40,878.72 is: 56,413.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,704.16 : 100,334.16 = 40,878.72 : x
  2. Step 2: Convert to fraction form
    72,704.16/100,334.16 = 40,878.72/x
  3. Step 3: Cross multiply
    72,704.16x = 100,334.16 × 40,878.72
  4. Step 4: Simplify right side
    72,704.16x = 4,101,532,033.08
  5. Step 5: Solve for x
    x = 4,101,532,033.08/72,704.16
  6. Step 6: Final answer
    x = 56,413.99

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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.