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Finding the Fourth Proportional to 75,111.51, 112,659.97 and 19,707.51

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Solution

The fourth proportional to 75,111.51, 112,659.97 and 19,707.51 is: 29,559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,111.51 : 112,659.97 = 19,707.51 : x
  2. Step 2: Convert to fraction form
    75,111.51/112,659.97 = 19,707.51/x
  3. Step 3: Cross multiply
    75,111.51x = 112,659.97 × 19,707.51
  4. Step 4: Simplify right side
    75,111.51x = 2,220,247,485.37
  5. Step 5: Solve for x
    x = 2,220,247,485.37/75,111.51
  6. Step 6: Final answer
    x = 29,559.35

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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.