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Finding the Fourth Proportional to 125,027.70, 172,527.31 and 74,031.31

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Solution

The fourth proportional to 125,027.70, 172,527.31 and 74,031.31 is: 102,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,027.70 : 172,527.31 = 74,031.31 : x
  2. Step 2: Convert to fraction form
    125,027.70/172,527.31 = 74,031.31/x
  3. Step 3: Cross multiply
    125,027.70x = 172,527.31 × 74,031.31
  4. Step 4: Simplify right side
    125,027.70x = 12,772,421,907.44
  5. Step 5: Solve for x
    x = 12,772,421,907.44/125,027.70
  6. Step 6: Final answer
    x = 102,156.74

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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.