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Finding the Fourth Proportional to 70,353.39, 105,530.18 and 20,433.63

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Solution

The fourth proportional to 70,353.39, 105,530.18 and 20,433.63 is: 30,650.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,353.39 : 105,530.18 = 20,433.63 : x
  2. Step 2: Convert to fraction form
    70,353.39/105,530.18 = 20,433.63/x
  3. Step 3: Cross multiply
    70,353.39x = 105,530.18 × 20,433.63
  4. Step 4: Simplify right side
    70,353.39x = 2,156,364,651.95
  5. Step 5: Solve for x
    x = 2,156,364,651.95/70,353.39
  6. Step 6: Final answer
    x = 30,650.47

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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.