Home / 115,788.80-159,705.60-71,091.20

Finding the Fourth Proportional to 115,788.80, 159,705.60 and 71,091.20

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Solution

The fourth proportional to 115,788.80, 159,705.60 and 71,091.20 is: 98,054.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,788.80 : 159,705.60 = 71,091.20 : x
  2. Step 2: Convert to fraction form
    115,788.80/159,705.60 = 71,091.20/x
  3. Step 3: Cross multiply
    115,788.80x = 159,705.60 × 71,091.20
  4. Step 4: Simplify right side
    115,788.80x = 11,353,662,750.72
  5. Step 5: Solve for x
    x = 11,353,662,750.72/115,788.80
  6. Step 6: Final answer
    x = 98,054.93

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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.