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Finding the Fourth Proportional to 66,405.20, 91,639.16 and 36,597.20

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Solution

The fourth proportional to 66,405.20, 91,639.16 and 36,597.20 is: 50,504.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,405.20 : 91,639.16 = 36,597.20 : x
  2. Step 2: Convert to fraction form
    66,405.20/91,639.16 = 36,597.20/x
  3. Step 3: Cross multiply
    66,405.20x = 91,639.16 × 36,597.20
  4. Step 4: Simplify right side
    66,405.20x = 3,353,736,025.17
  5. Step 5: Solve for x
    x = 3,353,736,025.17/66,405.20
  6. Step 6: Final answer
    x = 50,504.12

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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.