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Finding the Fourth Proportional to 66,464.80, 99,697.20 and 38,471.20

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Solution

The fourth proportional to 66,464.80, 99,697.20 and 38,471.20 is: 57,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,464.80 : 99,697.20 = 38,471.20 : x
  2. Step 2: Convert to fraction form
    66,464.80/99,697.20 = 38,471.20/x
  3. Step 3: Cross multiply
    66,464.80x = 99,697.20 × 38,471.20
  4. Step 4: Simplify right side
    66,464.80x = 3,835,470,920.64
  5. Step 5: Solve for x
    x = 3,835,470,920.64/66,464.80
  6. Step 6: Final answer
    x = 57,706.80

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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.