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Finding the Fourth Proportional to 108,402.59, 149,660.91 and 70,742.45

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Solution

The fourth proportional to 108,402.59, 149,660.91 and 70,742.45 is: 97,667.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,402.59 : 149,660.91 = 70,742.45 : x
  2. Step 2: Convert to fraction form
    108,402.59/149,660.91 = 70,742.45/x
  3. Step 3: Cross multiply
    108,402.59x = 149,660.91 × 70,742.45
  4. Step 4: Simplify right side
    108,402.59x = 10,587,378,694.33
  5. Step 5: Solve for x
    x = 10,587,378,694.33/108,402.59
  6. Step 6: Final answer
    x = 97,667.22

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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.