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Finding the Fourth Proportional to 115,905.20, 173,857.80 and 100,698.80

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Solution

The fourth proportional to 115,905.20, 173,857.80 and 100,698.80 is: 151,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,905.20 : 173,857.80 = 100,698.80 : x
  2. Step 2: Convert to fraction form
    115,905.20/173,857.80 = 100,698.80/x
  3. Step 3: Cross multiply
    115,905.20x = 173,857.80 × 100,698.80
  4. Step 4: Simplify right side
    115,905.20x = 17,507,271,830.64
  5. Step 5: Solve for x
    x = 17,507,271,830.64/115,905.20
  6. Step 6: Final answer
    x = 151,048.20

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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.