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Finding the Fourth Proportional to 140,603.40, 211,109.90 and 99,233.80

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Solution

The fourth proportional to 140,603.40, 211,109.90 and 99,233.80 is: 148,995.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,603.40 : 211,109.90 = 99,233.80 : x
  2. Step 2: Convert to fraction form
    140,603.40/211,109.90 = 99,233.80/x
  3. Step 3: Cross multiply
    140,603.40x = 211,109.90 × 99,233.80
  4. Step 4: Simplify right side
    140,603.40x = 20,949,237,594.62
  5. Step 5: Solve for x
    x = 20,949,237,594.62/140,603.40
  6. Step 6: Final answer
    x = 148,995.24

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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.