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Finding the Fourth Proportional to 108,161.55, 149,052.06 and 77,889.67

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Solution

The fourth proportional to 108,161.55, 149,052.06 and 77,889.67 is: 107,335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,161.55 : 149,052.06 = 77,889.67 : x
  2. Step 2: Convert to fraction form
    108,161.55/149,052.06 = 77,889.67/x
  3. Step 3: Cross multiply
    108,161.55x = 149,052.06 × 77,889.67
  4. Step 4: Simplify right side
    108,161.55x = 11,609,615,393.59
  5. Step 5: Solve for x
    x = 11,609,615,393.59/108,161.55
  6. Step 6: Final answer
    x = 107,335.88

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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.