Home / 102,981.40-154,212.90-67,730.20

Finding the Fourth Proportional to 102,981.40, 154,212.90 and 67,730.20

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Solution

The fourth proportional to 102,981.40, 154,212.90 and 67,730.20 is: 101,424.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,981.40 : 154,212.90 = 67,730.20 : x
  2. Step 2: Convert to fraction form
    102,981.40/154,212.90 = 67,730.20/x
  3. Step 3: Cross multiply
    102,981.40x = 154,212.90 × 67,730.20
  4. Step 4: Simplify right side
    102,981.40x = 10,444,870,559.58
  5. Step 5: Solve for x
    x = 10,444,870,559.58/102,981.40
  6. Step 6: Final answer
    x = 101,424.83

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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.