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Finding the Fourth Proportional to 203,619.80, 305,356.53 and 70,463.90

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Solution

The fourth proportional to 203,619.80, 305,356.53 and 70,463.90 is: 105,670.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,619.80 : 305,356.53 = 70,463.90 : x
  2. Step 2: Convert to fraction form
    203,619.80/305,356.53 = 70,463.90/x
  3. Step 3: Cross multiply
    203,619.80x = 305,356.53 × 70,463.90
  4. Step 4: Simplify right side
    203,619.80x = 21,516,611,994.27
  5. Step 5: Solve for x
    x = 21,516,611,994.27/203,619.80
  6. Step 6: Final answer
    x = 105,670.53

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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.