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Finding the Fourth Proportional to 66,389.76, 91,617 and 36,176.32

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Solution

The fourth proportional to 66,389.76, 91,617 and 36,176.32 is: 49,922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389.76 : 91,617 = 36,176.32 : x
  2. Step 2: Convert to fraction form
    66,389.76/91,617 = 36,176.32/x
  3. Step 3: Cross multiply
    66,389.76x = 91,617 × 36,176.32
  4. Step 4: Simplify right side
    66,389.76x = 3,314,365,909.44
  5. Step 5: Solve for x
    x = 3,314,365,909.44/66,389.76
  6. Step 6: Final answer
    x = 49,922.85

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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.