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Finding the Fourth Proportional to 107,740.70, 161,611.05 and 70,415.90

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Solution

The fourth proportional to 107,740.70, 161,611.05 and 70,415.90 is: 105,623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,740.70 : 161,611.05 = 70,415.90 : x
  2. Step 2: Convert to fraction form
    107,740.70/161,611.05 = 70,415.90/x
  3. Step 3: Cross multiply
    107,740.70x = 161,611.05 × 70,415.90
  4. Step 4: Simplify right side
    107,740.70x = 11,379,987,535.70
  5. Step 5: Solve for x
    x = 11,379,987,535.70/107,740.70
  6. Step 6: Final answer
    x = 105,623.85

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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.