Home / 90,421.21-135,478.88-54,774.43

Finding the Fourth Proportional to 90,421.21, 135,478.88 and 54,774.43

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Solution

The fourth proportional to 90,421.21, 135,478.88 and 54,774.43 is: 82,069.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,421.21 : 135,478.88 = 54,774.43 : x
  2. Step 2: Convert to fraction form
    90,421.21/135,478.88 = 54,774.43/x
  3. Step 3: Cross multiply
    90,421.21x = 135,478.88 × 54,774.43
  4. Step 4: Simplify right side
    90,421.21x = 7,420,778,021.87
  5. Step 5: Solve for x
    x = 7,420,778,021.87/90,421.21
  6. Step 6: Final answer
    x = 82,069.00

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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.