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Finding the Fourth Proportional to 99,329.98, 148,807.21 and 76,879.07

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Solution

The fourth proportional to 99,329.98, 148,807.21 and 76,879.07 is: 115,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,329.98 : 148,807.21 = 76,879.07 : x
  2. Step 2: Convert to fraction form
    99,329.98/148,807.21 = 76,879.07/x
  3. Step 3: Cross multiply
    99,329.98x = 148,807.21 × 76,879.07
  4. Step 4: Simplify right side
    99,329.98x = 11,440,159,914.09
  5. Step 5: Solve for x
    x = 11,440,159,914.09/99,329.98
  6. Step 6: Final answer
    x = 115,173.28

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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.