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Finding the Fourth Proportional to 66,999.30, 100,353.15 and 40,658.10

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Solution

The fourth proportional to 66,999.30, 100,353.15 and 40,658.10 is: 60,898.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,999.30 : 100,353.15 = 40,658.10 : x
  2. Step 2: Convert to fraction form
    66,999.30/100,353.15 = 40,658.10/x
  3. Step 3: Cross multiply
    66,999.30x = 100,353.15 × 40,658.10
  4. Step 4: Simplify right side
    66,999.30x = 4,080,168,408.02
  5. Step 5: Solve for x
    x = 4,080,168,408.02/66,999.30
  6. Step 6: Final answer
    x = 60,898.67

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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.