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Finding the Fourth Proportional to 70,028.80, 105,048.48 and 20,108.52

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Solution

The fourth proportional to 70,028.80, 105,048.48 and 20,108.52 is: 30,164.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,028.80 : 105,048.48 = 20,108.52 : x
  2. Step 2: Convert to fraction form
    70,028.80/105,048.48 = 20,108.52/x
  3. Step 3: Cross multiply
    70,028.80x = 105,048.48 × 20,108.52
  4. Step 4: Simplify right side
    70,028.80x = 2,112,369,461.05
  5. Step 5: Solve for x
    x = 2,112,369,461.05/70,028.80
  6. Step 6: Final answer
    x = 30,164.30

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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.