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Finding the Fourth Proportional to 108,474.03, 149,709.09 and 65,455.74

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Solution

The fourth proportional to 108,474.03, 149,709.09 and 65,455.74 is: 90,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,474.03 : 149,709.09 = 65,455.74 : x
  2. Step 2: Convert to fraction form
    108,474.03/149,709.09 = 65,455.74/x
  3. Step 3: Cross multiply
    108,474.03x = 149,709.09 × 65,455.74
  4. Step 4: Simplify right side
    108,474.03x = 9,799,319,270.68
  5. Step 5: Solve for x
    x = 9,799,319,270.68/108,474.03
  6. Step 6: Final answer
    x = 90,337.93

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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.