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Finding the Fourth Proportional to 64,815.66, 97,240.50 and 20,443.86

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Solution

The fourth proportional to 64,815.66, 97,240.50 and 20,443.86 is: 30,671.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,815.66 : 97,240.50 = 20,443.86 : x
  2. Step 2: Convert to fraction form
    64,815.66/97,240.50 = 20,443.86/x
  3. Step 3: Cross multiply
    64,815.66x = 97,240.50 × 20,443.86
  4. Step 4: Simplify right side
    64,815.66x = 1,987,971,168.33
  5. Step 5: Solve for x
    x = 1,987,971,168.33/64,815.66
  6. Step 6: Final answer
    x = 30,671.16

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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.