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Finding the Fourth Proportional to 125,354.99, 172,863.91 and 75,083.15

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Solution

The fourth proportional to 125,354.99, 172,863.91 and 75,083.15 is: 103,539.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,354.99 : 172,863.91 = 75,083.15 : x
  2. Step 2: Convert to fraction form
    125,354.99/172,863.91 = 75,083.15/x
  3. Step 3: Cross multiply
    125,354.99x = 172,863.91 × 75,083.15
  4. Step 4: Simplify right side
    125,354.99x = 12,979,166,884.12
  5. Step 5: Solve for x
    x = 12,979,166,884.12/125,354.99
  6. Step 6: Final answer
    x = 103,539.29

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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.