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Finding the Fourth Proportional to 90,752.80, 136,129.20 and 50,730.70

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Solution

The fourth proportional to 90,752.80, 136,129.20 and 50,730.70 is: 76,096.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,752.80 : 136,129.20 = 50,730.70 : x
  2. Step 2: Convert to fraction form
    90,752.80/136,129.20 = 50,730.70/x
  3. Step 3: Cross multiply
    90,752.80x = 136,129.20 × 50,730.70
  4. Step 4: Simplify right side
    90,752.80x = 6,905,929,606.44
  5. Step 5: Solve for x
    x = 6,905,929,606.44/90,752.80
  6. Step 6: Final answer
    x = 76,096.05

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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.