Home / 100,815.36-139,143.60-58,377.84

Finding the Fourth Proportional to 100,815.36, 139,143.60 and 58,377.84

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Solution

The fourth proportional to 100,815.36, 139,143.60 and 58,377.84 is: 80,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,815.36 : 139,143.60 = 58,377.84 : x
  2. Step 2: Convert to fraction form
    100,815.36/139,143.60 = 58,377.84/x
  3. Step 3: Cross multiply
    100,815.36x = 139,143.60 × 58,377.84
  4. Step 4: Simplify right side
    100,815.36x = 8,122,902,817.82
  5. Step 5: Solve for x
    x = 8,122,902,817.82/100,815.36
  6. Step 6: Final answer
    x = 80,572.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.