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Finding the Fourth Proportional to 125,338.86, 172,969.02 and 68,749.02

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Solution

The fourth proportional to 125,338.86, 172,969.02 and 68,749.02 is: 94,874.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,338.86 : 172,969.02 = 68,749.02 : x
  2. Step 2: Convert to fraction form
    125,338.86/172,969.02 = 68,749.02/x
  3. Step 3: Cross multiply
    125,338.86x = 172,969.02 × 68,749.02
  4. Step 4: Simplify right side
    125,338.86x = 11,891,450,615.36
  5. Step 5: Solve for x
    x = 11,891,450,615.36/125,338.86
  6. Step 6: Final answer
    x = 94,874.41

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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.