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Finding the Fourth Proportional to 76,886, 115,336.56 and 21,482

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Solution

The fourth proportional to 76,886, 115,336.56 and 21,482 is: 32,225.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,886 : 115,336.56 = 21,482 : x
  2. Step 2: Convert to fraction form
    76,886/115,336.56 = 21,482/x
  3. Step 3: Cross multiply
    76,886x = 115,336.56 × 21,482
  4. Step 4: Simplify right side
    76,886x = 2,477,659,981.92
  5. Step 5: Solve for x
    x = 2,477,659,981.92/76,886
  6. Step 6: Final answer
    x = 32,225.11

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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.