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Finding the Fourth Proportional to 70,400.80, 105,529.68 and 23,615.20

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Solution

The fourth proportional to 70,400.80, 105,529.68 and 23,615.20 is: 35,398.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,400.80 : 105,529.68 = 23,615.20 : x
  2. Step 2: Convert to fraction form
    70,400.80/105,529.68 = 23,615.20/x
  3. Step 3: Cross multiply
    70,400.80x = 105,529.68 × 23,615.20
  4. Step 4: Simplify right side
    70,400.80x = 2,492,104,499.14
  5. Step 5: Solve for x
    x = 2,492,104,499.14/70,400.80
  6. Step 6: Final answer
    x = 35,398.81

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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.