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Finding the Fourth Proportional to 66,447.40, 99,671.09 and 45,607.72

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Solution

The fourth proportional to 66,447.40, 99,671.09 and 45,607.72 is: 68,411.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.40 : 99,671.09 = 45,607.72 : x
  2. Step 2: Convert to fraction form
    66,447.40/99,671.09 = 45,607.72/x
  3. Step 3: Cross multiply
    66,447.40x = 99,671.09 × 45,607.72
  4. Step 4: Simplify right side
    66,447.40x = 4,545,770,780.48
  5. Step 5: Solve for x
    x = 4,545,770,780.48/66,447.40
  6. Step 6: Final answer
    x = 68,411.57

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1.5x scale

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.