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Finding the Fourth Proportional to 100,879.51, 151,262.75 and 46,786.20

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Solution

The fourth proportional to 100,879.51, 151,262.75 and 46,786.20 is: 70,153.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,879.51 : 151,262.75 = 46,786.20 : x
  2. Step 2: Convert to fraction form
    100,879.51/151,262.75 = 46,786.20/x
  3. Step 3: Cross multiply
    100,879.51x = 151,262.75 × 46,786.20
  4. Step 4: Simplify right side
    100,879.51x = 7,077,008,283.81
  5. Step 5: Solve for x
    x = 7,077,008,283.81/100,879.51
  6. Step 6: Final answer
    x = 70,153.08

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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.