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Finding the Fourth Proportional to 64,874.40, 97,311.60 and 18,127.20

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Solution

The fourth proportional to 64,874.40, 97,311.60 and 18,127.20 is: 27,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,874.40 : 97,311.60 = 18,127.20 : x
  2. Step 2: Convert to fraction form
    64,874.40/97,311.60 = 18,127.20/x
  3. Step 3: Cross multiply
    64,874.40x = 97,311.60 × 18,127.20
  4. Step 4: Simplify right side
    64,874.40x = 1,763,986,835.52
  5. Step 5: Solve for x
    x = 1,763,986,835.52/64,874.40
  6. Step 6: Final answer
    x = 27,190.80

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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.