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Finding the Fourth Proportional to 125,300.25, 172,914.35 and 68,712.84

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Solution

The fourth proportional to 125,300.25, 172,914.35 and 68,712.84 is: 94,823.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,300.25 : 172,914.35 = 68,712.84 : x
  2. Step 2: Convert to fraction form
    125,300.25/172,914.35 = 68,712.84/x
  3. Step 3: Cross multiply
    125,300.25x = 172,914.35 × 68,712.84
  4. Step 4: Simplify right side
    125,300.25x = 11,881,435,721.69
  5. Step 5: Solve for x
    x = 11,881,435,721.69/125,300.25
  6. Step 6: Final answer
    x = 94,823.72

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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.