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Finding the Fourth Proportional to 209,637.63, 289,254.92 and 124,738.11

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Solution

The fourth proportional to 209,637.63, 289,254.92 and 124,738.11 is: 172,111.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,637.63 : 289,254.92 = 124,738.11 : x
  2. Step 2: Convert to fraction form
    209,637.63/289,254.92 = 124,738.11/x
  3. Step 3: Cross multiply
    209,637.63x = 289,254.92 × 124,738.11
  4. Step 4: Simplify right side
    209,637.63x = 36,081,111,405.31
  5. Step 5: Solve for x
    x = 36,081,111,405.31/209,637.63
  6. Step 6: Final answer
    x = 172,111.81

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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.