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Finding the Fourth Proportional to 91,681.69, 126,531.23 and 51,406.33

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Solution

The fourth proportional to 91,681.69, 126,531.23 and 51,406.33 is: 70,946.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,681.69 : 126,531.23 = 51,406.33 : x
  2. Step 2: Convert to fraction form
    91,681.69/126,531.23 = 51,406.33/x
  3. Step 3: Cross multiply
    91,681.69x = 126,531.23 × 51,406.33
  4. Step 4: Simplify right side
    91,681.69x = 6,504,505,907.65
  5. Step 5: Solve for x
    x = 6,504,505,907.65/91,681.69
  6. Step 6: Final answer
    x = 70,946.62

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1.5x scale

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.