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Finding the Fourth Proportional to 64,640.39, 96,960.59 and 20,271.02

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Solution

The fourth proportional to 64,640.39, 96,960.59 and 20,271.02 is: 30,406.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,640.39 : 96,960.59 = 20,271.02 : x
  2. Step 2: Convert to fraction form
    64,640.39/96,960.59 = 20,271.02/x
  3. Step 3: Cross multiply
    64,640.39x = 96,960.59 × 20,271.02
  4. Step 4: Simplify right side
    64,640.39x = 1,965,489,472.94
  5. Step 5: Solve for x
    x = 1,965,489,472.94/64,640.39
  6. Step 6: Final answer
    x = 30,406.52

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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.