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Finding the Fourth Proportional to 125,893.98, 172,956.60 and 112,640.76

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Solution

The fourth proportional to 125,893.98, 172,956.60 and 112,640.76 is: 154,748.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,893.98 : 172,956.60 = 112,640.76 : x
  2. Step 2: Convert to fraction form
    125,893.98/172,956.60 = 112,640.76/x
  3. Step 3: Cross multiply
    125,893.98x = 172,956.60 × 112,640.76
  4. Step 4: Simplify right side
    125,893.98x = 19,481,962,871.02
  5. Step 5: Solve for x
    x = 19,481,962,871.02/125,893.98
  6. Step 6: Final answer
    x = 154,748.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.