Home / 78,135.64-117,080.37-60,409.60

Finding the Fourth Proportional to 78,135.64, 117,080.37 and 60,409.60

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Solution

The fourth proportional to 78,135.64, 117,080.37 and 60,409.60 is: 90,519.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,135.64 : 117,080.37 = 60,409.60 : x
  2. Step 2: Convert to fraction form
    78,135.64/117,080.37 = 60,409.60/x
  3. Step 3: Cross multiply
    78,135.64x = 117,080.37 × 60,409.60
  4. Step 4: Simplify right side
    78,135.64x = 7,072,778,026.85
  5. Step 5: Solve for x
    x = 7,072,778,026.85/78,135.64
  6. Step 6: Final answer
    x = 90,519.23

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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.