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Finding the Fourth Proportional to 90,858, 125,384.12 and 51,114

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Solution

The fourth proportional to 90,858, 125,384.12 and 51,114 is: 70,537.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,858 : 125,384.12 = 51,114 : x
  2. Step 2: Convert to fraction form
    90,858/125,384.12 = 51,114/x
  3. Step 3: Cross multiply
    90,858x = 125,384.12 × 51,114
  4. Step 4: Simplify right side
    90,858x = 6,408,883,909.68
  5. Step 5: Solve for x
    x = 6,408,883,909.68/90,858
  6. Step 6: Final answer
    x = 70,537.37

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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.