Home / 109,879.40-163,895.36-99,788.78

Finding the Fourth Proportional to 109,879.40, 163,895.36 and 99,788.78

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Solution

The fourth proportional to 109,879.40, 163,895.36 and 99,788.78 is: 148,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,879.40 : 163,895.36 = 99,788.78 : x
  2. Step 2: Convert to fraction form
    109,879.40/163,895.36 = 99,788.78/x
  3. Step 3: Cross multiply
    109,879.40x = 163,895.36 × 99,788.78
  4. Step 4: Simplify right side
    109,879.40x = 16,354,918,022.06
  5. Step 5: Solve for x
    x = 16,354,918,022.06/109,879.40
  6. Step 6: Final answer
    x = 148,844.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.