Home / 78,023.28-117,033.60-18,858.48

Finding the Fourth Proportional to 78,023.28, 117,033.60 and 18,858.48

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Solution

The fourth proportional to 78,023.28, 117,033.60 and 18,858.48 is: 28,287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.28 : 117,033.60 = 18,858.48 : x
  2. Step 2: Convert to fraction form
    78,023.28/117,033.60 = 18,858.48/x
  3. Step 3: Cross multiply
    78,023.28x = 117,033.60 × 18,858.48
  4. Step 4: Simplify right side
    78,023.28x = 2,207,075,804.93
  5. Step 5: Solve for x
    x = 2,207,075,804.93/78,023.28
  6. Step 6: Final answer
    x = 28,287.40

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1.5x scale

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.