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Finding the Fourth Proportional to 218,805.48, 301,944.42 and 138,276.20

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Solution

The fourth proportional to 218,805.48, 301,944.42 and 138,276.20 is: 190,816.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,805.48 : 301,944.42 = 138,276.20 : x
  2. Step 2: Convert to fraction form
    218,805.48/301,944.42 = 138,276.20/x
  3. Step 3: Cross multiply
    218,805.48x = 301,944.42 × 138,276.20
  4. Step 4: Simplify right side
    218,805.48x = 41,751,727,008.80
  5. Step 5: Solve for x
    x = 41,751,727,008.80/218,805.48
  6. Step 6: Final answer
    x = 190,816.64

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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.