Home / 138,896.12-191,666.70-81,537.80

Finding the Fourth Proportional to 138,896.12, 191,666.70 and 81,537.80

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Solution

The fourth proportional to 138,896.12, 191,666.70 and 81,537.80 is: 112,516.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,896.12 : 191,666.70 = 81,537.80 : x
  2. Step 2: Convert to fraction form
    138,896.12/191,666.70 = 81,537.80/x
  3. Step 3: Cross multiply
    138,896.12x = 191,666.70 × 81,537.80
  4. Step 4: Simplify right side
    138,896.12x = 15,628,081,051.26
  5. Step 5: Solve for x
    x = 15,628,081,051.26/138,896.12
  6. Step 6: Final answer
    x = 112,516.33

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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.