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Finding the Fourth Proportional to 107,690.85, 148,620.42 and 71,858.07

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Solution

The fourth proportional to 107,690.85, 148,620.42 and 71,858.07 is: 99,168.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,690.85 : 148,620.42 = 71,858.07 : x
  2. Step 2: Convert to fraction form
    107,690.85/148,620.42 = 71,858.07/x
  3. Step 3: Cross multiply
    107,690.85x = 148,620.42 × 71,858.07
  4. Step 4: Simplify right side
    107,690.85x = 10,679,576,543.79
  5. Step 5: Solve for x
    x = 10,679,576,543.79/107,690.85
  6. Step 6: Final answer
    x = 99,168.84

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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.