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Finding the Fourth Proportional to 66,447.65, 99,671.47 and 45,607.97

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Solution

The fourth proportional to 66,447.65, 99,671.47 and 45,607.97 is: 68,411.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.65 : 99,671.47 = 45,607.97 : x
  2. Step 2: Convert to fraction form
    66,447.65/99,671.47 = 45,607.97/x
  3. Step 3: Cross multiply
    66,447.65x = 99,671.47 × 45,607.97
  4. Step 4: Simplify right side
    66,447.65x = 4,545,812,801.24
  5. Step 5: Solve for x
    x = 4,545,812,801.24/66,447.65
  6. Step 6: Final answer
    x = 68,411.95

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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.