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Finding the Fourth Proportional to 66,011.54, 91,131.32 and 50,981.99

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Solution

The fourth proportional to 66,011.54, 91,131.32 and 50,981.99 is: 70,382.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,011.54 : 91,131.32 = 50,981.99 : x
  2. Step 2: Convert to fraction form
    66,011.54/91,131.32 = 50,981.99/x
  3. Step 3: Cross multiply
    66,011.54x = 91,131.32 × 50,981.99
  4. Step 4: Simplify right side
    66,011.54x = 4,646,055,334.36
  5. Step 5: Solve for x
    x = 4,646,055,334.36/66,011.54
  6. Step 6: Final answer
    x = 70,382.48

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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.