Home / 100,815.84-139,115.88-58,388.04

Finding the Fourth Proportional to 100,815.84, 139,115.88 and 58,388.04

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Solution

The fourth proportional to 100,815.84, 139,115.88 and 58,388.04 is: 80,569.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,815.84 : 139,115.88 = 58,388.04 : x
  2. Step 2: Convert to fraction form
    100,815.84/139,115.88 = 58,388.04/x
  3. Step 3: Cross multiply
    100,815.84x = 139,115.88 × 58,388.04
  4. Step 4: Simplify right side
    100,815.84x = 8,122,703,566.08
  5. Step 5: Solve for x
    x = 8,122,703,566.08/100,815.84
  6. Step 6: Final answer
    x = 80,569.72

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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.