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Finding the Fourth Proportional to 125,347.50, 172,979.55 and 68,759.01

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Solution

The fourth proportional to 125,347.50, 172,979.55 and 68,759.01 is: 94,887.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,347.50 : 172,979.55 = 68,759.01 : x
  2. Step 2: Convert to fraction form
    125,347.50/172,979.55 = 68,759.01/x
  3. Step 3: Cross multiply
    125,347.50x = 172,979.55 × 68,759.01
  4. Step 4: Simplify right side
    125,347.50x = 11,893,902,608.25
  5. Step 5: Solve for x
    x = 11,893,902,608.25/125,347.50
  6. Step 6: Final answer
    x = 94,887.43

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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.