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Finding the Fourth Proportional to 70,186.60, 105,280.66 and 20,267.11

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Solution

The fourth proportional to 70,186.60, 105,280.66 and 20,267.11 is: 30,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,186.60 : 105,280.66 = 20,267.11 : x
  2. Step 2: Convert to fraction form
    70,186.60/105,280.66 = 20,267.11/x
  3. Step 3: Cross multiply
    70,186.60x = 105,280.66 × 20,267.11
  4. Step 4: Simplify right side
    70,186.60x = 2,133,734,874.03
  5. Step 5: Solve for x
    x = 2,133,734,874.03/70,186.60
  6. Step 6: Final answer
    x = 30,400.89

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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.