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Finding the Fourth Proportional to 78,962.74, 109,083.83 and 68,333.92

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Solution

The fourth proportional to 78,962.74, 109,083.83 and 68,333.92 is: 94,400.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,962.74 : 109,083.83 = 68,333.92 : x
  2. Step 2: Convert to fraction form
    78,962.74/109,083.83 = 68,333.92/x
  3. Step 3: Cross multiply
    78,962.74x = 109,083.83 × 68,333.92
  4. Step 4: Simplify right side
    78,962.74x = 7,454,125,712.51
  5. Step 5: Solve for x
    x = 7,454,125,712.51/78,962.74
  6. Step 6: Final answer
    x = 94,400.55

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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.