Home / 90,021.80-135,032.70-89,438.60

Finding the Fourth Proportional to 90,021.80, 135,032.70 and 89,438.60

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Solution

The fourth proportional to 90,021.80, 135,032.70 and 89,438.60 is: 134,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,021.80 : 135,032.70 = 89,438.60 : x
  2. Step 2: Convert to fraction form
    90,021.80/135,032.70 = 89,438.60/x
  3. Step 3: Cross multiply
    90,021.80x = 135,032.70 × 89,438.60
  4. Step 4: Simplify right side
    90,021.80x = 12,077,135,642.22
  5. Step 5: Solve for x
    x = 12,077,135,642.22/90,021.80
  6. Step 6: Final answer
    x = 134,157.90

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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.