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Finding the Fourth Proportional to 340,065.40, 510,081.90 and 115,403.80

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Solution

The fourth proportional to 340,065.40, 510,081.90 and 115,403.80 is: 173,100.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,065.40 : 510,081.90 = 115,403.80 : x
  2. Step 2: Convert to fraction form
    340,065.40/510,081.90 = 115,403.80/x
  3. Step 3: Cross multiply
    340,065.40x = 510,081.90 × 115,403.80
  4. Step 4: Simplify right side
    340,065.40x = 58,865,389,571.22
  5. Step 5: Solve for x
    x = 58,865,389,571.22/340,065.40
  6. Step 6: Final answer
    x = 173,100.20

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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.