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Finding the Fourth Proportional to 66,721.35, 99,410.37 and 65,759.07

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Solution

The fourth proportional to 66,721.35, 99,410.37 and 65,759.07 is: 97,976.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,721.35 : 99,410.37 = 65,759.07 : x
  2. Step 2: Convert to fraction form
    66,721.35/99,410.37 = 65,759.07/x
  3. Step 3: Cross multiply
    66,721.35x = 99,410.37 × 65,759.07
  4. Step 4: Simplify right side
    66,721.35x = 6,537,133,479.56
  5. Step 5: Solve for x
    x = 6,537,133,479.56/66,721.35
  6. Step 6: Final answer
    x = 97,976.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.