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Finding the Fourth Proportional to 203,717.40, 305,502.90 and 70,561.80

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Solution

The fourth proportional to 203,717.40, 305,502.90 and 70,561.80 is: 105,817.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,717.40 : 305,502.90 = 70,561.80 : x
  2. Step 2: Convert to fraction form
    203,717.40/305,502.90 = 70,561.80/x
  3. Step 3: Cross multiply
    203,717.40x = 305,502.90 × 70,561.80
  4. Step 4: Simplify right side
    203,717.40x = 21,556,834,529.22
  5. Step 5: Solve for x
    x = 21,556,834,529.22/203,717.40
  6. Step 6: Final answer
    x = 105,817.35

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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.