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Finding the Fourth Proportional to 130,108.70, 194,980.80 and 103,500.20

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Solution

The fourth proportional to 130,108.70, 194,980.80 and 103,500.20 is: 155,105.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,108.70 : 194,980.80 = 103,500.20 : x
  2. Step 2: Convert to fraction form
    130,108.70/194,980.80 = 103,500.20/x
  3. Step 3: Cross multiply
    130,108.70x = 194,980.80 × 103,500.20
  4. Step 4: Simplify right side
    130,108.70x = 20,180,551,796.16
  5. Step 5: Solve for x
    x = 20,180,551,796.16/130,108.70
  6. Step 6: Final answer
    x = 155,105.32

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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.