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Finding the Fourth Proportional to 221,259.60, 305,365.68 and 135,200.88

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Solution

The fourth proportional to 221,259.60, 305,365.68 and 135,200.88 is: 186,593.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,259.60 : 305,365.68 = 135,200.88 : x
  2. Step 2: Convert to fraction form
    221,259.60/305,365.68 = 135,200.88/x
  3. Step 3: Cross multiply
    221,259.60x = 305,365.68 × 135,200.88
  4. Step 4: Simplify right side
    221,259.60x = 41,285,708,657.80
  5. Step 5: Solve for x
    x = 41,285,708,657.80/221,259.60
  6. Step 6: Final answer
    x = 186,593.98

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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.