Home / 90,678.32-135,760.84-69,306.54

Finding the Fourth Proportional to 90,678.32, 135,760.84 and 69,306.54

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Solution

The fourth proportional to 90,678.32, 135,760.84 and 69,306.54 is: 103,763.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,678.32 : 135,760.84 = 69,306.54 : x
  2. Step 2: Convert to fraction form
    90,678.32/135,760.84 = 69,306.54/x
  3. Step 3: Cross multiply
    90,678.32x = 135,760.84 × 69,306.54
  4. Step 4: Simplify right side
    90,678.32x = 9,409,114,087.89
  5. Step 5: Solve for x
    x = 9,409,114,087.89/90,678.32
  6. Step 6: Final answer
    x = 103,763.66

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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.