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Finding the Fourth Proportional to 125,293.77, 172,904.90 and 68,705.01

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Solution

The fourth proportional to 125,293.77, 172,904.90 and 68,705.01 is: 94,812.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,293.77 : 172,904.90 = 68,705.01 : x
  2. Step 2: Convert to fraction form
    125,293.77/172,904.90 = 68,705.01/x
  3. Step 3: Cross multiply
    125,293.77x = 172,904.90 × 68,705.01
  4. Step 4: Simplify right side
    125,293.77x = 11,879,432,540.02
  5. Step 5: Solve for x
    x = 11,879,432,540.02/125,293.77
  6. Step 6: Final answer
    x = 94,812.64

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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.