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Finding the Fourth Proportional to 210,989.21, 316,483.82 and 63,245.21

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Solution

The fourth proportional to 210,989.21, 316,483.82 and 63,245.21 is: 94,867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,989.21 : 316,483.82 = 63,245.21 : x
  2. Step 2: Convert to fraction form
    210,989.21/316,483.82 = 63,245.21/x
  3. Step 3: Cross multiply
    210,989.21x = 316,483.82 × 63,245.21
  4. Step 4: Simplify right side
    210,989.21x = 20,016,083,758.86
  5. Step 5: Solve for x
    x = 20,016,083,758.86/210,989.21
  6. Step 6: Final answer
    x = 94,867.81

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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.