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Finding the Fourth Proportional to 76,021.94, 104,905.77 and 42,028.40

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Solution

The fourth proportional to 76,021.94, 104,905.77 and 42,028.40 is: 57,996.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,021.94 : 104,905.77 = 42,028.40 : x
  2. Step 2: Convert to fraction form
    76,021.94/104,905.77 = 42,028.40/x
  3. Step 3: Cross multiply
    76,021.94x = 104,905.77 × 42,028.40
  4. Step 4: Simplify right side
    76,021.94x = 4,409,021,335.83
  5. Step 5: Solve for x
    x = 4,409,021,335.83/76,021.94
  6. Step 6: Final answer
    x = 57,996.69

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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.