Home / 70,134.12-105,208.20-20,215.44

Finding the Fourth Proportional to 70,134.12, 105,208.20 and 20,215.44

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Solution

The fourth proportional to 70,134.12, 105,208.20 and 20,215.44 is: 30,325.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,134.12 : 105,208.20 = 20,215.44 : x
  2. Step 2: Convert to fraction form
    70,134.12/105,208.20 = 20,215.44/x
  3. Step 3: Cross multiply
    70,134.12x = 105,208.20 × 20,215.44
  4. Step 4: Simplify right side
    70,134.12x = 2,126,830,054.61
  5. Step 5: Solve for x
    x = 2,126,830,054.61/70,134.12
  6. Step 6: Final answer
    x = 30,325.18

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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.