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Finding the Fourth Proportional to 125,106, 172,646.28 and 68,519.40

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Solution

The fourth proportional to 125,106, 172,646.28 and 68,519.40 is: 94,556.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,106 : 172,646.28 = 68,519.40 : x
  2. Step 2: Convert to fraction form
    125,106/172,646.28 = 68,519.40/x
  3. Step 3: Cross multiply
    125,106x = 172,646.28 × 68,519.40
  4. Step 4: Simplify right side
    125,106x = 11,829,619,517.83
  5. Step 5: Solve for x
    x = 11,829,619,517.83/125,106
  6. Step 6: Final answer
    x = 94,556.77

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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.