Home / 90,406.95-135,516.30-30,390.81

Finding the Fourth Proportional to 90,406.95, 135,516.30 and 30,390.81

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Solution

The fourth proportional to 90,406.95, 135,516.30 and 30,390.81 is: 45,554.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,406.95 : 135,516.30 = 30,390.81 : x
  2. Step 2: Convert to fraction form
    90,406.95/135,516.30 = 30,390.81/x
  3. Step 3: Cross multiply
    90,406.95x = 135,516.30 × 30,390.81
  4. Step 4: Simplify right side
    90,406.95x = 4,118,450,125.20
  5. Step 5: Solve for x
    x = 4,118,450,125.20/90,406.95
  6. Step 6: Final answer
    x = 45,554.57

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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.