Home / 78,133.85-117,199.91-18,969.49

Finding the Fourth Proportional to 78,133.85, 117,199.91 and 18,969.49

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Solution

The fourth proportional to 78,133.85, 117,199.91 and 18,969.49 is: 28,454.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,133.85 : 117,199.91 = 18,969.49 : x
  2. Step 2: Convert to fraction form
    78,133.85/117,199.91 = 18,969.49/x
  3. Step 3: Cross multiply
    78,133.85x = 117,199.91 × 18,969.49
  4. Step 4: Simplify right side
    78,133.85x = 2,223,222,714.67
  5. Step 5: Solve for x
    x = 2,223,222,714.67/78,133.85
  6. Step 6: Final answer
    x = 28,454.03

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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.