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Finding the Fourth Proportional to 66,446.90, 99,670.34 and 45,607.22

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Solution

The fourth proportional to 66,446.90, 99,670.34 and 45,607.22 is: 68,410.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,446.90 : 99,670.34 = 45,607.22 : x
  2. Step 2: Convert to fraction form
    66,446.90/99,670.34 = 45,607.22/x
  3. Step 3: Cross multiply
    66,446.90x = 99,670.34 × 45,607.22
  4. Step 4: Simplify right side
    66,446.90x = 4,545,686,739.52
  5. Step 5: Solve for x
    x = 4,545,686,739.52/66,446.90
  6. Step 6: Final answer
    x = 68,410.82

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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.