Home / 115,939.15-159,916.01-81,556.79

Finding the Fourth Proportional to 115,939.15, 159,916.01 and 81,556.79

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Solution

The fourth proportional to 115,939.15, 159,916.01 and 81,556.79 is: 112,492.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,939.15 : 159,916.01 = 81,556.79 : x
  2. Step 2: Convert to fraction form
    115,939.15/159,916.01 = 81,556.79/x
  3. Step 3: Cross multiply
    115,939.15x = 159,916.01 × 81,556.79
  4. Step 4: Simplify right side
    115,939.15x = 13,042,235,237.84
  5. Step 5: Solve for x
    x = 13,042,235,237.84/115,939.15
  6. Step 6: Final answer
    x = 112,492.07

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1.5x scale

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.