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Finding the Fourth Proportional to 138,962.37, 191,768.73 and 75,300.30

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Solution

The fourth proportional to 138,962.37, 191,768.73 and 75,300.30 is: 103,914.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,962.37 : 191,768.73 = 75,300.30 : x
  2. Step 2: Convert to fraction form
    138,962.37/191,768.73 = 75,300.30/x
  3. Step 3: Cross multiply
    138,962.37x = 191,768.73 × 75,300.30
  4. Step 4: Simplify right side
    138,962.37x = 14,440,242,899.62
  5. Step 5: Solve for x
    x = 14,440,242,899.62/138,962.37
  6. Step 6: Final answer
    x = 103,914.77

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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.