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Finding the Fourth Proportional to 125,120.97, 172,664.99 and 71,404.60

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Solution

The fourth proportional to 125,120.97, 172,664.99 and 71,404.60 is: 98,537.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,120.97 : 172,664.99 = 71,404.60 : x
  2. Step 2: Convert to fraction form
    125,120.97/172,664.99 = 71,404.60/x
  3. Step 3: Cross multiply
    125,120.97x = 172,664.99 × 71,404.60
  4. Step 4: Simplify right side
    125,120.97x = 12,329,074,187.93
  5. Step 5: Solve for x
    x = 12,329,074,187.93/125,120.97
  6. Step 6: Final answer
    x = 98,537.24

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1.5x scale

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.