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Finding the Fourth Proportional to 100,894.76, 139,222.58 and 57,872.04

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Solution

The fourth proportional to 100,894.76, 139,222.58 and 57,872.04 is: 79,856.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,894.76 : 139,222.58 = 57,872.04 : x
  2. Step 2: Convert to fraction form
    100,894.76/139,222.58 = 57,872.04/x
  3. Step 3: Cross multiply
    100,894.76x = 139,222.58 × 57,872.04
  4. Step 4: Simplify right side
    100,894.76x = 8,057,094,718.66
  5. Step 5: Solve for x
    x = 8,057,094,718.66/100,894.76
  6. Step 6: Final answer
    x = 79,856.42

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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.