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Finding the Fourth Proportional to 91,704.51, 126,566.42 and 51,434.55

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Solution

The fourth proportional to 91,704.51, 126,566.42 and 51,434.55 is: 70,987.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,704.51 : 126,566.42 = 51,434.55 : x
  2. Step 2: Convert to fraction form
    91,704.51/126,566.42 = 51,434.55/x
  3. Step 3: Cross multiply
    91,704.51x = 126,566.42 × 51,434.55
  4. Step 4: Simplify right side
    91,704.51x = 6,509,886,600.64
  5. Step 5: Solve for x
    x = 6,509,886,600.64/91,704.51
  6. Step 6: Final answer
    x = 70,987.64

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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.