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Finding the Fourth Proportional to 70,015.20, 105,029.34 and 27,885.12

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Solution

The fourth proportional to 70,015.20, 105,029.34 and 27,885.12 is: 41,830.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,015.20 : 105,029.34 = 27,885.12 : x
  2. Step 2: Convert to fraction form
    70,015.20/105,029.34 = 27,885.12/x
  3. Step 3: Cross multiply
    70,015.20x = 105,029.34 × 27,885.12
  4. Step 4: Simplify right side
    70,015.20x = 2,928,755,749.42
  5. Step 5: Solve for x
    x = 2,928,755,749.42/70,015.20
  6. Step 6: Final answer
    x = 41,830.28

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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.