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Finding the Fourth Proportional to 108,639.78, 149,916.68 and 63,325.14

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Solution

The fourth proportional to 108,639.78, 149,916.68 and 63,325.14 is: 87,385.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,639.78 : 149,916.68 = 63,325.14 : x
  2. Step 2: Convert to fraction form
    108,639.78/149,916.68 = 63,325.14/x
  3. Step 3: Cross multiply
    108,639.78x = 149,916.68 × 63,325.14
  4. Step 4: Simplify right side
    108,639.78x = 9,493,494,749.34
  5. Step 5: Solve for x
    x = 9,493,494,749.34/108,639.78
  6. Step 6: Final answer
    x = 87,385.07

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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.