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Finding the Fourth Proportional to 125,246.78, 172,840.56 and 68,656.94

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Solution

The fourth proportional to 125,246.78, 172,840.56 and 68,656.94 is: 94,746.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,246.78 : 172,840.56 = 68,656.94 : x
  2. Step 2: Convert to fraction form
    125,246.78/172,840.56 = 68,656.94/x
  3. Step 3: Cross multiply
    125,246.78x = 172,840.56 × 68,656.94
  4. Step 4: Simplify right side
    125,246.78x = 11,866,703,957.49
  5. Step 5: Solve for x
    x = 11,866,703,957.49/125,246.78
  6. Step 6: Final answer
    x = 94,746.58

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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.