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Finding the Fourth Proportional to 70,028.30, 105,026.43 and 20,108

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Solution

The fourth proportional to 70,028.30, 105,026.43 and 20,108 is: 30,157.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,028.30 : 105,026.43 = 20,108 : x
  2. Step 2: Convert to fraction form
    70,028.30/105,026.43 = 20,108/x
  3. Step 3: Cross multiply
    70,028.30x = 105,026.43 × 20,108
  4. Step 4: Simplify right side
    70,028.30x = 2,111,871,454.44
  5. Step 5: Solve for x
    x = 2,111,871,454.44/70,028.30
  6. Step 6: Final answer
    x = 30,157.40

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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.