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Finding the Fourth Proportional to 243,040.20, 363,977.10 and 118,235.40

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Solution

The fourth proportional to 243,040.20, 363,977.10 and 118,235.40 is: 177,069.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,040.20 : 363,977.10 = 118,235.40 : x
  2. Step 2: Convert to fraction form
    243,040.20/363,977.10 = 118,235.40/x
  3. Step 3: Cross multiply
    243,040.20x = 363,977.10 × 118,235.40
  4. Step 4: Simplify right side
    243,040.20x = 43,034,978,009.34
  5. Step 5: Solve for x
    x = 43,034,978,009.34/243,040.20
  6. Step 6: Final answer
    x = 177,069.38

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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.