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Finding the Fourth Proportional to 66,208.47, 91,411.34 and 51,074.79

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Solution

The fourth proportional to 66,208.47, 91,411.34 and 51,074.79 is: 70,516.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,208.47 : 91,411.34 = 51,074.79 : x
  2. Step 2: Convert to fraction form
    66,208.47/91,411.34 = 51,074.79/x
  3. Step 3: Cross multiply
    66,208.47x = 91,411.34 × 51,074.79
  4. Step 4: Simplify right side
    66,208.47x = 4,668,814,738.74
  5. Step 5: Solve for x
    x = 4,668,814,738.74/66,208.47
  6. Step 6: Final answer
    x = 70,516.88

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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.