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Finding the Fourth Proportional to 66,130.56, 99,204.48 and 21,742.56

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Solution

The fourth proportional to 66,130.56, 99,204.48 and 21,742.56 is: 32,616.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,130.56 : 99,204.48 = 21,742.56 : x
  2. Step 2: Convert to fraction form
    66,130.56/99,204.48 = 21,742.56/x
  3. Step 3: Cross multiply
    66,130.56x = 99,204.48 × 21,742.56
  4. Step 4: Simplify right side
    66,130.56x = 2,156,959,358.67
  5. Step 5: Solve for x
    x = 2,156,959,358.67/66,130.56
  6. Step 6: Final answer
    x = 32,616.68

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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.