Home / 115,405.40-173,108.10-72,140.60

Finding the Fourth Proportional to 115,405.40, 173,108.10 and 72,140.60

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Solution

The fourth proportional to 115,405.40, 173,108.10 and 72,140.60 is: 108,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,405.40 : 173,108.10 = 72,140.60 : x
  2. Step 2: Convert to fraction form
    115,405.40/173,108.10 = 72,140.60/x
  3. Step 3: Cross multiply
    115,405.40x = 173,108.10 × 72,140.60
  4. Step 4: Simplify right side
    115,405.40x = 12,488,122,198.86
  5. Step 5: Solve for x
    x = 12,488,122,198.86/115,405.40
  6. Step 6: Final answer
    x = 108,210.90

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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.