Home / 105,423.40-158,135.10-43,138.60

Finding the Fourth Proportional to 105,423.40, 158,135.10 and 43,138.60

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Solution

The fourth proportional to 105,423.40, 158,135.10 and 43,138.60 is: 64,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,423.40 : 158,135.10 = 43,138.60 : x
  2. Step 2: Convert to fraction form
    105,423.40/158,135.10 = 43,138.60/x
  3. Step 3: Cross multiply
    105,423.40x = 158,135.10 × 43,138.60
  4. Step 4: Simplify right side
    105,423.40x = 6,821,726,824.86
  5. Step 5: Solve for x
    x = 6,821,726,824.86/105,423.40
  6. Step 6: Final answer
    x = 64,707.90

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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.