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Finding the Fourth Proportional to 70,143.94, 105,200.88 and 20,214.73

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Solution

The fourth proportional to 70,143.94, 105,200.88 and 20,214.73 is: 30,317.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,143.94 : 105,200.88 = 20,214.73 : x
  2. Step 2: Convert to fraction form
    70,143.94/105,200.88 = 20,214.73/x
  3. Step 3: Cross multiply
    70,143.94x = 105,200.88 × 20,214.73
  4. Step 4: Simplify right side
    70,143.94x = 2,126,607,440.66
  5. Step 5: Solve for x
    x = 2,126,607,440.66/70,143.94
  6. Step 6: Final answer
    x = 30,317.76

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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.