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Finding the Fourth Proportional to 144,630.60, 216,945.90 and 131,728.20

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Solution

The fourth proportional to 144,630.60, 216,945.90 and 131,728.20 is: 197,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,630.60 : 216,945.90 = 131,728.20 : x
  2. Step 2: Convert to fraction form
    144,630.60/216,945.90 = 131,728.20/x
  3. Step 3: Cross multiply
    144,630.60x = 216,945.90 × 131,728.20
  4. Step 4: Simplify right side
    144,630.60x = 28,577,892,904.38
  5. Step 5: Solve for x
    x = 28,577,892,904.38/144,630.60
  6. Step 6: Final answer
    x = 197,592.30

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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.