Home / 115,268.28-172,980.20-45,138.84

Finding the Fourth Proportional to 115,268.28, 172,980.20 and 45,138.84

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Solution

The fourth proportional to 115,268.28, 172,980.20 and 45,138.84 is: 67,738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,268.28 : 172,980.20 = 45,138.84 : x
  2. Step 2: Convert to fraction form
    115,268.28/172,980.20 = 45,138.84/x
  3. Step 3: Cross multiply
    115,268.28x = 172,980.20 × 45,138.84
  4. Step 4: Simplify right side
    115,268.28x = 7,808,125,570.97
  5. Step 5: Solve for x
    x = 7,808,125,570.97/115,268.28
  6. Step 6: Final answer
    x = 67,738.72

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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.