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Finding the Fourth Proportional to 66,389.46, 91,733.97 and 53,070.63

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Solution

The fourth proportional to 66,389.46, 91,733.97 and 53,070.63 is: 73,330.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389.46 : 91,733.97 = 53,070.63 : x
  2. Step 2: Convert to fraction form
    66,389.46/91,733.97 = 53,070.63/x
  3. Step 3: Cross multiply
    66,389.46x = 91,733.97 × 53,070.63
  4. Step 4: Simplify right side
    66,389.46x = 4,868,379,136.79
  5. Step 5: Solve for x
    x = 4,868,379,136.79/66,389.46
  6. Step 6: Final answer
    x = 73,330.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.