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Finding the Fourth Proportional to 259,590.62, 389,559.68 and 91,111.74

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Solution

The fourth proportional to 259,590.62, 389,559.68 and 91,111.74 is: 136,728.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,590.62 : 389,559.68 = 91,111.74 : x
  2. Step 2: Convert to fraction form
    259,590.62/389,559.68 = 91,111.74/x
  3. Step 3: Cross multiply
    259,590.62x = 389,559.68 × 91,111.74
  4. Step 4: Simplify right side
    259,590.62x = 35,493,458,703.90
  5. Step 5: Solve for x
    x = 35,493,458,703.90/259,590.62
  6. Step 6: Final answer
    x = 136,728.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.