Home / 78,303.07-117,453.59-19,139.25

Finding the Fourth Proportional to 78,303.07, 117,453.59 and 19,139.25

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Solution

The fourth proportional to 78,303.07, 117,453.59 and 19,139.25 is: 28,708.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,303.07 : 117,453.59 = 19,139.25 : x
  2. Step 2: Convert to fraction form
    78,303.07/117,453.59 = 19,139.25/x
  3. Step 3: Cross multiply
    78,303.07x = 117,453.59 × 19,139.25
  4. Step 4: Simplify right side
    78,303.07x = 2,247,973,622.41
  5. Step 5: Solve for x
    x = 2,247,973,622.41/78,303.07
  6. Step 6: Final answer
    x = 28,708.63

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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.