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Finding the Fourth Proportional to 108,424.40, 149,520.68 and 84,542.36

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Solution

The fourth proportional to 108,424.40, 149,520.68 and 84,542.36 is: 116,586.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,424.40 : 149,520.68 = 84,542.36 : x
  2. Step 2: Convert to fraction form
    108,424.40/149,520.68 = 84,542.36/x
  3. Step 3: Cross multiply
    108,424.40x = 149,520.68 × 84,542.36
  4. Step 4: Simplify right side
    108,424.40x = 12,640,829,985.69
  5. Step 5: Solve for x
    x = 12,640,829,985.69/108,424.40
  6. Step 6: Final answer
    x = 116,586.59

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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.