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Finding the Fourth Proportional to 130,999.20, 196,693.20 and 91,730.40

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Solution

The fourth proportional to 130,999.20, 196,693.20 and 91,730.40 is: 137,731.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,999.20 : 196,693.20 = 91,730.40 : x
  2. Step 2: Convert to fraction form
    130,999.20/196,693.20 = 91,730.40/x
  3. Step 3: Cross multiply
    130,999.20x = 196,693.20 × 91,730.40
  4. Step 4: Simplify right side
    130,999.20x = 18,042,745,913.28
  5. Step 5: Solve for x
    x = 18,042,745,913.28/130,999.20
  6. Step 6: Final answer
    x = 137,731.73

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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.