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Finding the Fourth Proportional to 125,400.72, 173,053.08 and 68,815.20

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Solution

The fourth proportional to 125,400.72, 173,053.08 and 68,815.20 is: 94,965.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,400.72 : 173,053.08 = 68,815.20 : x
  2. Step 2: Convert to fraction form
    125,400.72/173,053.08 = 68,815.20/x
  3. Step 3: Cross multiply
    125,400.72x = 173,053.08 × 68,815.20
  4. Step 4: Simplify right side
    125,400.72x = 11,908,682,310.82
  5. Step 5: Solve for x
    x = 11,908,682,310.82/125,400.72
  6. Step 6: Final answer
    x = 94,965.02

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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.