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Finding the Fourth Proportional to 90,647.94, 125,059.64 and 66,831.51

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Solution

The fourth proportional to 90,647.94, 125,059.64 and 66,831.51 is: 92,202.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,647.94 : 125,059.64 = 66,831.51 : x
  2. Step 2: Convert to fraction form
    90,647.94/125,059.64 = 66,831.51/x
  3. Step 3: Cross multiply
    90,647.94x = 125,059.64 × 66,831.51
  4. Step 4: Simplify right side
    90,647.94x = 8,357,924,247.10
  5. Step 5: Solve for x
    x = 8,357,924,247.10/90,647.94
  6. Step 6: Final answer
    x = 92,202.03

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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.