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Finding the Fourth Proportional to 73,398.60, 109,968.30 and 45,664.20

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Solution

The fourth proportional to 73,398.60, 109,968.30 and 45,664.20 is: 68,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,398.60 : 109,968.30 = 45,664.20 : x
  2. Step 2: Convert to fraction form
    73,398.60/109,968.30 = 45,664.20/x
  3. Step 3: Cross multiply
    73,398.60x = 109,968.30 × 45,664.20
  4. Step 4: Simplify right side
    73,398.60x = 5,021,614,444.86
  5. Step 5: Solve for x
    x = 5,021,614,444.86/73,398.60
  6. Step 6: Final answer
    x = 68,415.67

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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.