Home / 78,936.60-117,829.06-68,971.98

Finding the Fourth Proportional to 78,936.60, 117,829.06 and 68,971.98

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Solution

The fourth proportional to 78,936.60, 117,829.06 and 68,971.98 is: 102,954.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,936.60 : 117,829.06 = 68,971.98 : x
  2. Step 2: Convert to fraction form
    78,936.60/117,829.06 = 68,971.98/x
  3. Step 3: Cross multiply
    78,936.60x = 117,829.06 × 68,971.98
  4. Step 4: Simplify right side
    78,936.60x = 8,126,903,569.74
  5. Step 5: Solve for x
    x = 8,126,903,569.74/78,936.60
  6. Step 6: Final answer
    x = 102,954.82

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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.