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Finding the Fourth Proportional to 216,865.40, 325,038.90 and 111,630.20

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Solution

The fourth proportional to 216,865.40, 325,038.90 and 111,630.20 is: 167,311.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,865.40 : 325,038.90 = 111,630.20 : x
  2. Step 2: Convert to fraction form
    216,865.40/325,038.90 = 111,630.20/x
  3. Step 3: Cross multiply
    216,865.40x = 325,038.90 × 111,630.20
  4. Step 4: Simplify right side
    216,865.40x = 36,284,157,414.78
  5. Step 5: Solve for x
    x = 36,284,157,414.78/216,865.40
  6. Step 6: Final answer
    x = 167,311.88

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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.