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Finding the Fourth Proportional to 64,620.42, 89,184.15 and 36,325.50

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Solution

The fourth proportional to 64,620.42, 89,184.15 and 36,325.50 is: 50,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,620.42 : 89,184.15 = 36,325.50 : x
  2. Step 2: Convert to fraction form
    64,620.42/89,184.15 = 36,325.50/x
  3. Step 3: Cross multiply
    64,620.42x = 89,184.15 × 36,325.50
  4. Step 4: Simplify right side
    64,620.42x = 3,239,658,840.83
  5. Step 5: Solve for x
    x = 3,239,658,840.83/64,620.42
  6. Step 6: Final answer
    x = 50,133.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.