Home / 91,578.72-126,391.41-66,167.28

Finding the Fourth Proportional to 91,578.72, 126,391.41 and 66,167.28

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Solution

The fourth proportional to 91,578.72, 126,391.41 and 66,167.28 is: 91,320.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,578.72 : 126,391.41 = 66,167.28 : x
  2. Step 2: Convert to fraction form
    91,578.72/126,391.41 = 66,167.28/x
  3. Step 3: Cross multiply
    91,578.72x = 126,391.41 × 66,167.28
  4. Step 4: Simplify right side
    91,578.72x = 8,362,975,815.06
  5. Step 5: Solve for x
    x = 8,362,975,815.06/91,578.72
  6. Step 6: Final answer
    x = 91,320.08

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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.