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Finding the Fourth Proportional to 118,995.20, 178,147.20 and 115,539.20

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Solution

The fourth proportional to 118,995.20, 178,147.20 and 115,539.20 is: 172,973.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,995.20 : 178,147.20 = 115,539.20 : x
  2. Step 2: Convert to fraction form
    118,995.20/178,147.20 = 115,539.20/x
  3. Step 3: Cross multiply
    118,995.20x = 178,147.20 × 115,539.20
  4. Step 4: Simplify right side
    118,995.20x = 20,582,984,970.24
  5. Step 5: Solve for x
    x = 20,582,984,970.24/118,995.20
  6. Step 6: Final answer
    x = 172,973.24

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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.