Home / 90,428.20-135,603.90-43,695.40

Finding the Fourth Proportional to 90,428.20, 135,603.90 and 43,695.40

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Solution

The fourth proportional to 90,428.20, 135,603.90 and 43,695.40 is: 65,524.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428.20 : 135,603.90 = 43,695.40 : x
  2. Step 2: Convert to fraction form
    90,428.20/135,603.90 = 43,695.40/x
  3. Step 3: Cross multiply
    90,428.20x = 135,603.90 × 43,695.40
  4. Step 4: Simplify right side
    90,428.20x = 5,925,266,652.06
  5. Step 5: Solve for x
    x = 5,925,266,652.06/90,428.20
  6. Step 6: Final answer
    x = 65,524.54

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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.