Home / 115,178.48-158,976-74,992.64

Finding the Fourth Proportional to 115,178.48, 158,976 and 74,992.64

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Solution

The fourth proportional to 115,178.48, 158,976 and 74,992.64 is: 103,509.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,178.48 : 158,976 = 74,992.64 : x
  2. Step 2: Convert to fraction form
    115,178.48/158,976 = 74,992.64/x
  3. Step 3: Cross multiply
    115,178.48x = 158,976 × 74,992.64
  4. Step 4: Simplify right side
    115,178.48x = 11,922,029,936.64
  5. Step 5: Solve for x
    x = 11,922,029,936.64/115,178.48
  6. Step 6: Final answer
    x = 103,509.18

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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.