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Finding the Fourth Proportional to 218,820.78, 301,972.73 and 118,218.78

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Solution

The fourth proportional to 218,820.78, 301,972.73 and 118,218.78 is: 163,141.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,820.78 : 301,972.73 = 118,218.78 : x
  2. Step 2: Convert to fraction form
    218,820.78/301,972.73 = 118,218.78/x
  3. Step 3: Cross multiply
    218,820.78x = 301,972.73 × 118,218.78
  4. Step 4: Simplify right side
    218,820.78x = 35,698,847,142.78
  5. Step 5: Solve for x
    x = 35,698,847,142.78/218,820.78
  6. Step 6: Final answer
    x = 163,141.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.