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Finding the Fourth Proportional to 90,567.78, 124,949.25 and 66,751.38

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Solution

The fourth proportional to 90,567.78, 124,949.25 and 66,751.38 is: 92,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,567.78 : 124,949.25 = 66,751.38 : x
  2. Step 2: Convert to fraction form
    90,567.78/124,949.25 = 66,751.38/x
  3. Step 3: Cross multiply
    90,567.78x = 124,949.25 × 66,751.38
  4. Step 4: Simplify right side
    90,567.78x = 8,340,534,867.47
  5. Step 5: Solve for x
    x = 8,340,534,867.47/90,567.78
  6. Step 6: Final answer
    x = 92,091.63

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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.