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Finding the Fourth Proportional to 65,608.86, 90,540 and 36,928.50

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Solution

The fourth proportional to 65,608.86, 90,540 and 36,928.50 is: 50,961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,608.86 : 90,540 = 36,928.50 : x
  2. Step 2: Convert to fraction form
    65,608.86/90,540 = 36,928.50/x
  3. Step 3: Cross multiply
    65,608.86x = 90,540 × 36,928.50
  4. Step 4: Simplify right side
    65,608.86x = 3,343,506,616.35
  5. Step 5: Solve for x
    x = 3,343,506,616.35/65,608.86
  6. Step 6: Final answer
    x = 50,961.21

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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.