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Finding the Fourth Proportional to 66,290.78, 91,483.22 and 36,078.07

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Solution

The fourth proportional to 66,290.78, 91,483.22 and 36,078.07 is: 49,788.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,290.78 : 91,483.22 = 36,078.07 : x
  2. Step 2: Convert to fraction form
    66,290.78/91,483.22 = 36,078.07/x
  3. Step 3: Cross multiply
    66,290.78x = 91,483.22 × 36,078.07
  4. Step 4: Simplify right side
    66,290.78x = 3,300,538,014.99
  5. Step 5: Solve for x
    x = 3,300,538,014.99/66,290.78
  6. Step 6: Final answer
    x = 49,788.79

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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.