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Finding the Fourth Proportional to 203,477.13, 305,215.69 and 78,818.13

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Solution

The fourth proportional to 203,477.13, 305,215.69 and 78,818.13 is: 118,227.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,477.13 : 305,215.69 = 78,818.13 : x
  2. Step 2: Convert to fraction form
    203,477.13/305,215.69 = 78,818.13/x
  3. Step 3: Cross multiply
    203,477.13x = 305,215.69 × 78,818.13
  4. Step 4: Simplify right side
    203,477.13x = 24,056,529,932.46
  5. Step 5: Solve for x
    x = 24,056,529,932.46/203,477.13
  6. Step 6: Final answer
    x = 118,227.19

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1.5x scale

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.