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Finding the Fourth Proportional to 115,987.45, 160,139.79 and 89,081.89

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Solution

The fourth proportional to 115,987.45, 160,139.79 and 89,081.89 is: 122,992.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,987.45 : 160,139.79 = 89,081.89 : x
  2. Step 2: Convert to fraction form
    115,987.45/160,139.79 = 89,081.89/x
  3. Step 3: Cross multiply
    115,987.45x = 160,139.79 × 89,081.89
  4. Step 4: Simplify right side
    115,987.45x = 14,265,555,157.40
  5. Step 5: Solve for x
    x = 14,265,555,157.40/115,987.45
  6. Step 6: Final answer
    x = 122,992.23

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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.