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Finding the Fourth Proportional to 100,828.60, 151,264.80 and 30,706.08

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Solution

The fourth proportional to 100,828.60, 151,264.80 and 30,706.08 is: 46,065.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,828.60 : 151,264.80 = 30,706.08 : x
  2. Step 2: Convert to fraction form
    100,828.60/151,264.80 = 30,706.08/x
  3. Step 3: Cross multiply
    100,828.60x = 151,264.80 × 30,706.08
  4. Step 4: Simplify right side
    100,828.60x = 4,644,749,049.98
  5. Step 5: Solve for x
    x = 4,644,749,049.98/100,828.60
  6. Step 6: Final answer
    x = 46,065.79

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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.