Home / 90,701.37-125,124.35-78,104.25

Finding the Fourth Proportional to 90,701.37, 125,124.35 and 78,104.25

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Solution

The fourth proportional to 90,701.37, 125,124.35 and 78,104.25 is: 107,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,701.37 : 125,124.35 = 78,104.25 : x
  2. Step 2: Convert to fraction form
    90,701.37/125,124.35 = 78,104.25/x
  3. Step 3: Cross multiply
    90,701.37x = 125,124.35 × 78,104.25
  4. Step 4: Simplify right side
    90,701.37x = 9,772,743,122.97
  5. Step 5: Solve for x
    x = 9,772,743,122.97/90,701.37
  6. Step 6: Final answer
    x = 107,746.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.