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Finding the Fourth Proportional to 78,169.39, 116,973.80 and 67,675.51

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Solution

The fourth proportional to 78,169.39, 116,973.80 and 67,675.51 is: 101,270.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,169.39 : 116,973.80 = 67,675.51 : x
  2. Step 2: Convert to fraction form
    78,169.39/116,973.80 = 67,675.51/x
  3. Step 3: Cross multiply
    78,169.39x = 116,973.80 × 67,675.51
  4. Step 4: Simplify right side
    78,169.39x = 7,916,261,355.96
  5. Step 5: Solve for x
    x = 7,916,261,355.96/78,169.39
  6. Step 6: Final answer
    x = 101,270.60

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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.