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Finding the Fourth Proportional to 70,536.07, 105,793.17 and 20,602.76

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Solution

The fourth proportional to 70,536.07, 105,793.17 and 20,602.76 is: 30,900.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,536.07 : 105,793.17 = 20,602.76 : x
  2. Step 2: Convert to fraction form
    70,536.07/105,793.17 = 20,602.76/x
  3. Step 3: Cross multiply
    70,536.07x = 105,793.17 × 20,602.76
  4. Step 4: Simplify right side
    70,536.07x = 2,179,630,659.17
  5. Step 5: Solve for x
    x = 2,179,630,659.17/70,536.07
  6. Step 6: Final answer
    x = 30,900.94

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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.