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Finding the Fourth Proportional to 90,629.80, 135,969.18 and 64,500.40

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Solution

The fourth proportional to 90,629.80, 135,969.18 and 64,500.40 is: 96,768.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,629.80 : 135,969.18 = 64,500.40 : x
  2. Step 2: Convert to fraction form
    90,629.80/135,969.18 = 64,500.40/x
  3. Step 3: Cross multiply
    90,629.80x = 135,969.18 × 64,500.40
  4. Step 4: Simplify right side
    90,629.80x = 8,770,066,497.67
  5. Step 5: Solve for x
    x = 8,770,066,497.67/90,629.80
  6. Step 6: Final answer
    x = 96,768.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.