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Finding the Fourth Proportional to 67,045.41, 100,609.64 and 38,978.67

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Solution

The fourth proportional to 67,045.41, 100,609.64 and 38,978.67 is: 58,492.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,045.41 : 100,609.64 = 38,978.67 : x
  2. Step 2: Convert to fraction form
    67,045.41/100,609.64 = 38,978.67/x
  3. Step 3: Cross multiply
    67,045.41x = 100,609.64 × 38,978.67
  4. Step 4: Simplify right side
    67,045.41x = 3,921,629,509.96
  5. Step 5: Solve for x
    x = 3,921,629,509.96/67,045.41
  6. Step 6: Final answer
    x = 58,492.14

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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.