Home / 115,416.19-159,173.96-81,364.60

Finding the Fourth Proportional to 115,416.19, 159,173.96 and 81,364.60

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Solution

The fourth proportional to 115,416.19, 159,173.96 and 81,364.60 is: 112,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,416.19 : 159,173.96 = 81,364.60 : x
  2. Step 2: Convert to fraction form
    115,416.19/159,173.96 = 81,364.60/x
  3. Step 3: Cross multiply
    115,416.19x = 159,173.96 × 81,364.60
  4. Step 4: Simplify right side
    115,416.19x = 12,951,125,835.64
  5. Step 5: Solve for x
    x = 12,951,125,835.64/115,416.19
  6. Step 6: Final answer
    x = 112,212.38

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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.