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Finding the Fourth Proportional to 92,315.10, 138,363.30 and 68,914.20

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Solution

The fourth proportional to 92,315.10, 138,363.30 and 68,914.20 is: 103,289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,315.10 : 138,363.30 = 68,914.20 : x
  2. Step 2: Convert to fraction form
    92,315.10/138,363.30 = 68,914.20/x
  3. Step 3: Cross multiply
    92,315.10x = 138,363.30 × 68,914.20
  4. Step 4: Simplify right side
    92,315.10x = 9,535,196,128.86
  5. Step 5: Solve for x
    x = 9,535,196,128.86/92,315.10
  6. Step 6: Final answer
    x = 103,289.67

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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.