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Finding the Fourth Proportional to 66,582.40, 99,871.68 and 27,129.76

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Solution

The fourth proportional to 66,582.40, 99,871.68 and 27,129.76 is: 40,693.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,582.40 : 99,871.68 = 27,129.76 : x
  2. Step 2: Convert to fraction form
    66,582.40/99,871.68 = 27,129.76/x
  3. Step 3: Cross multiply
    66,582.40x = 99,871.68 × 27,129.76
  4. Step 4: Simplify right side
    66,582.40x = 2,709,494,709.20
  5. Step 5: Solve for x
    x = 2,709,494,709.20/66,582.40
  6. Step 6: Final answer
    x = 40,693.86

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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.