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Finding the Fourth Proportional to 66,447.15, 99,670.72 and 45,607.47

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Solution

The fourth proportional to 66,447.15, 99,670.72 and 45,607.47 is: 68,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.15 : 99,670.72 = 45,607.47 : x
  2. Step 2: Convert to fraction form
    66,447.15/99,670.72 = 45,607.47/x
  3. Step 3: Cross multiply
    66,447.15x = 99,670.72 × 45,607.47
  4. Step 4: Simplify right side
    66,447.15x = 4,545,728,759.91
  5. Step 5: Solve for x
    x = 4,545,728,759.91/66,447.15
  6. Step 6: Final answer
    x = 68,411.20

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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.