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Finding the Fourth Proportional to 91,063.89, 136,595.84 and 28,739.25

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Solution

The fourth proportional to 91,063.89, 136,595.84 and 28,739.25 is: 43,108.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,063.89 : 136,595.84 = 28,739.25 : x
  2. Step 2: Convert to fraction form
    91,063.89/136,595.84 = 28,739.25/x
  3. Step 3: Cross multiply
    91,063.89x = 136,595.84 × 28,739.25
  4. Step 4: Simplify right side
    91,063.89x = 3,925,661,994.72
  5. Step 5: Solve for x
    x = 3,925,661,994.72/91,063.89
  6. Step 6: Final answer
    x = 43,108.88

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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.