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Finding the Fourth Proportional to 125,397, 173,039.40 and 68,812.02

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Solution

The fourth proportional to 125,397, 173,039.40 and 68,812.02 is: 94,955.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,397 : 173,039.40 = 68,812.02 : x
  2. Step 2: Convert to fraction form
    125,397/173,039.40 = 68,812.02/x
  3. Step 3: Cross multiply
    125,397x = 173,039.40 × 68,812.02
  4. Step 4: Simplify right side
    125,397x = 11,907,190,653.59
  5. Step 5: Solve for x
    x = 11,907,190,653.59/125,397
  6. Step 6: Final answer
    x = 94,955.95

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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.