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Finding the Fourth Proportional to 64,639.66, 96,960.66 and 20,265.40

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Solution

The fourth proportional to 64,639.66, 96,960.66 and 20,265.40 is: 30,398.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,639.66 : 96,960.66 = 20,265.40 : x
  2. Step 2: Convert to fraction form
    64,639.66/96,960.66 = 20,265.40/x
  3. Step 3: Cross multiply
    64,639.66x = 96,960.66 × 20,265.40
  4. Step 4: Simplify right side
    64,639.66x = 1,964,946,559.16
  5. Step 5: Solve for x
    x = 1,964,946,559.16/64,639.66
  6. Step 6: Final answer
    x = 30,398.47

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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.