Home / 102,928.10-154,246.35-90,389.30

Finding the Fourth Proportional to 102,928.10, 154,246.35 and 90,389.30

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Solution

The fourth proportional to 102,928.10, 154,246.35 and 90,389.30 is: 135,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,928.10 : 154,246.35 = 90,389.30 : x
  2. Step 2: Convert to fraction form
    102,928.10/154,246.35 = 90,389.30/x
  3. Step 3: Cross multiply
    102,928.10x = 154,246.35 × 90,389.30
  4. Step 4: Simplify right side
    102,928.10x = 13,942,219,604.06
  5. Step 5: Solve for x
    x = 13,942,219,604.06/102,928.10
  6. Step 6: Final answer
    x = 135,455.91

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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.