Home / 78,169.26-116,681.82-67,146.78

Finding the Fourth Proportional to 78,169.26, 116,681.82 and 67,146.78

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Solution

The fourth proportional to 78,169.26, 116,681.82 and 67,146.78 is: 100,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,169.26 : 116,681.82 = 67,146.78 : x
  2. Step 2: Convert to fraction form
    78,169.26/116,681.82 = 67,146.78/x
  3. Step 3: Cross multiply
    78,169.26x = 116,681.82 × 67,146.78
  4. Step 4: Simplify right side
    78,169.26x = 7,834,807,914.13
  5. Step 5: Solve for x
    x = 7,834,807,914.13/78,169.26
  6. Step 6: Final answer
    x = 100,228.77

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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.