Home / 118,603.09-163,739.93-78,433.36

Finding the Fourth Proportional to 118,603.09, 163,739.93 and 78,433.36

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Solution

The fourth proportional to 118,603.09, 163,739.93 and 78,433.36 is: 108,282.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,603.09 : 163,739.93 = 78,433.36 : x
  2. Step 2: Convert to fraction form
    118,603.09/163,739.93 = 78,433.36/x
  3. Step 3: Cross multiply
    118,603.09x = 163,739.93 × 78,433.36
  4. Step 4: Simplify right side
    118,603.09x = 12,842,673,436.77
  5. Step 5: Solve for x
    x = 12,842,673,436.77/118,603.09
  6. Step 6: Final answer
    x = 108,282.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.