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Finding the Fourth Proportional to 125,172, 172,751.82 and 71,464.68

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Solution

The fourth proportional to 125,172, 172,751.82 and 71,464.68 is: 98,629.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,172 : 172,751.82 = 71,464.68 : x
  2. Step 2: Convert to fraction form
    125,172/172,751.82 = 71,464.68/x
  3. Step 3: Cross multiply
    125,172x = 172,751.82 × 71,464.68
  4. Step 4: Simplify right side
    125,172x = 12,345,653,535.72
  5. Step 5: Solve for x
    x = 12,345,653,535.72/125,172
  6. Step 6: Final answer
    x = 98,629.51

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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.