Home / 90,015.95-135,040.34-30,857.60

Finding the Fourth Proportional to 90,015.95, 135,040.34 and 30,857.60

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Solution

The fourth proportional to 90,015.95, 135,040.34 and 30,857.60 is: 46,292.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,015.95 : 135,040.34 = 30,857.60 : x
  2. Step 2: Convert to fraction form
    90,015.95/135,040.34 = 30,857.60/x
  3. Step 3: Cross multiply
    90,015.95x = 135,040.34 × 30,857.60
  4. Step 4: Simplify right side
    90,015.95x = 4,167,020,978.90
  5. Step 5: Solve for x
    x = 4,167,020,978.90/90,015.95
  6. Step 6: Final answer
    x = 46,292.03

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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.