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Finding the Fourth Proportional to 125,060.76, 172,735.34 and 91,015.25

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Solution

The fourth proportional to 125,060.76, 172,735.34 and 91,015.25 is: 125,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,060.76 : 172,735.34 = 91,015.25 : x
  2. Step 2: Convert to fraction form
    125,060.76/172,735.34 = 91,015.25/x
  3. Step 3: Cross multiply
    125,060.76x = 172,735.34 × 91,015.25
  4. Step 4: Simplify right side
    125,060.76x = 15,721,548,835.18
  5. Step 5: Solve for x
    x = 15,721,548,835.18/125,060.76
  6. Step 6: Final answer
    x = 125,711.28

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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.