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Finding the Fourth Proportional to 218,628.10, 301,728.24 and 127,978.60

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Solution

The fourth proportional to 218,628.10, 301,728.24 and 127,978.60 is: 176,623.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,628.10 : 301,728.24 = 127,978.60 : x
  2. Step 2: Convert to fraction form
    218,628.10/301,728.24 = 127,978.60/x
  3. Step 3: Cross multiply
    218,628.10x = 301,728.24 × 127,978.60
  4. Step 4: Simplify right side
    218,628.10x = 38,614,757,735.66
  5. Step 5: Solve for x
    x = 38,614,757,735.66/218,628.10
  6. Step 6: Final answer
    x = 176,623.03

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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.