Home / 54,900.12-75,684.60-38,978.76

Finding the Fourth Proportional to 54,900.12, 75,684.60 and 38,978.76

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Solution

The fourth proportional to 54,900.12, 75,684.60 and 38,978.76 is: 53,735.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,900.12 : 75,684.60 = 38,978.76 : x
  2. Step 2: Convert to fraction form
    54,900.12/75,684.60 = 38,978.76/x
  3. Step 3: Cross multiply
    54,900.12x = 75,684.60 × 38,978.76
  4. Step 4: Simplify right side
    54,900.12x = 2,950,091,859.10
  5. Step 5: Solve for x
    x = 2,950,091,859.10/54,900.12
  6. Step 6: Final answer
    x = 53,735.62

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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.