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Finding the Fourth Proportional to 66,085.93, 91,239.89 and 45,425.01

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Solution

The fourth proportional to 66,085.93, 91,239.89 and 45,425.01 is: 62,714.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,085.93 : 91,239.89 = 45,425.01 : x
  2. Step 2: Convert to fraction form
    66,085.93/91,239.89 = 45,425.01/x
  3. Step 3: Cross multiply
    66,085.93x = 91,239.89 × 45,425.01
  4. Step 4: Simplify right side
    66,085.93x = 4,144,572,915.65
  5. Step 5: Solve for x
    x = 4,144,572,915.65/66,085.93
  6. Step 6: Final answer
    x = 62,714.91

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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.