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Finding the Fourth Proportional to 99,978.36, 149,967.60 and 26,106.36

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Solution

The fourth proportional to 99,978.36, 149,967.60 and 26,106.36 is: 39,159.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,978.36 : 149,967.60 = 26,106.36 : x
  2. Step 2: Convert to fraction form
    99,978.36/149,967.60 = 26,106.36/x
  3. Step 3: Cross multiply
    99,978.36x = 149,967.60 × 26,106.36
  4. Step 4: Simplify right side
    99,978.36x = 3,915,108,153.94
  5. Step 5: Solve for x
    x = 3,915,108,153.94/99,978.36
  6. Step 6: Final answer
    x = 39,159.56

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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.