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Finding the Fourth Proportional to 162,920.70, 244,271.70 and 78,721.20

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Solution

The fourth proportional to 162,920.70, 244,271.70 and 78,721.20 is: 118,028.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,920.70 : 244,271.70 = 78,721.20 : x
  2. Step 2: Convert to fraction form
    162,920.70/244,271.70 = 78,721.20/x
  3. Step 3: Cross multiply
    162,920.70x = 244,271.70 × 78,721.20
  4. Step 4: Simplify right side
    162,920.70x = 19,229,361,350.04
  5. Step 5: Solve for x
    x = 19,229,361,350.04/162,920.70
  6. Step 6: Final answer
    x = 118,028.96

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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.