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Finding the Fourth Proportional to 76,037.94, 114,039.97 and 21,990.78

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Solution

The fourth proportional to 76,037.94, 114,039.97 and 21,990.78 is: 32,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,037.94 : 114,039.97 = 21,990.78 : x
  2. Step 2: Convert to fraction form
    76,037.94/114,039.97 = 21,990.78/x
  3. Step 3: Cross multiply
    76,037.94x = 114,039.97 × 21,990.78
  4. Step 4: Simplify right side
    76,037.94x = 2,507,827,836.50
  5. Step 5: Solve for x
    x = 2,507,827,836.50/76,037.94
  6. Step 6: Final answer
    x = 32,981.27

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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.