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Finding the Fourth Proportional to 101,911.90, 140,539.44 and 79,210.84

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Solution

The fourth proportional to 101,911.90, 140,539.44 and 79,210.84 is: 109,234.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,911.90 : 140,539.44 = 79,210.84 : x
  2. Step 2: Convert to fraction form
    101,911.90/140,539.44 = 79,210.84/x
  3. Step 3: Cross multiply
    101,911.90x = 140,539.44 × 79,210.84
  4. Step 4: Simplify right side
    101,911.90x = 11,132,247,095.53
  5. Step 5: Solve for x
    x = 11,132,247,095.53/101,911.90
  6. Step 6: Final answer
    x = 109,234.03

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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.