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Finding the Fourth Proportional to 108,699.47, 149,954.22 and 76,885.91

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Solution

The fourth proportional to 108,699.47, 149,954.22 and 76,885.91 is: 106,066.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,699.47 : 149,954.22 = 76,885.91 : x
  2. Step 2: Convert to fraction form
    108,699.47/149,954.22 = 76,885.91/x
  3. Step 3: Cross multiply
    108,699.47x = 149,954.22 × 76,885.91
  4. Step 4: Simplify right side
    108,699.47x = 11,529,366,475.60
  5. Step 5: Solve for x
    x = 11,529,366,475.60/108,699.47
  6. Step 6: Final answer
    x = 106,066.45

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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.