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Finding the Fourth Proportional to 90,963, 136,278.26 and 65,940.99

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Solution

The fourth proportional to 90,963, 136,278.26 and 65,940.99 is: 98,790.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,963 : 136,278.26 = 65,940.99 : x
  2. Step 2: Convert to fraction form
    90,963/136,278.26 = 65,940.99/x
  3. Step 3: Cross multiply
    90,963x = 136,278.26 × 65,940.99
  4. Step 4: Simplify right side
    90,963x = 8,986,323,050.17
  5. Step 5: Solve for x
    x = 8,986,323,050.17/90,963
  6. Step 6: Final answer
    x = 98,790.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.