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Finding the Fourth Proportional to 70,506.61, 105,665.95 and 37,218.85

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Solution

The fourth proportional to 70,506.61, 105,665.95 and 37,218.85 is: 55,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,506.61 : 105,665.95 = 37,218.85 : x
  2. Step 2: Convert to fraction form
    70,506.61/105,665.95 = 37,218.85/x
  3. Step 3: Cross multiply
    70,506.61x = 105,665.95 × 37,218.85
  4. Step 4: Simplify right side
    70,506.61x = 3,932,765,143.16
  5. Step 5: Solve for x
    x = 3,932,765,143.16/70,506.61
  6. Step 6: Final answer
    x = 55,778.67

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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.