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Finding the Fourth Proportional to 115,329.60, 172,848.60 and 102,790.80

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Solution

The fourth proportional to 115,329.60, 172,848.60 and 102,790.80 is: 154,056.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,329.60 : 172,848.60 = 102,790.80 : x
  2. Step 2: Convert to fraction form
    115,329.60/172,848.60 = 102,790.80/x
  3. Step 3: Cross multiply
    115,329.60x = 172,848.60 × 102,790.80
  4. Step 4: Simplify right side
    115,329.60x = 17,767,245,872.88
  5. Step 5: Solve for x
    x = 17,767,245,872.88/115,329.60
  6. Step 6: Final answer
    x = 154,056.25

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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.