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Finding the Fourth Proportional to 57,971.40, 79,963.36 and 39,813.36

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Solution

The fourth proportional to 57,971.40, 79,963.36 and 39,813.36 is: 54,916.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,971.40 : 79,963.36 = 39,813.36 : x
  2. Step 2: Convert to fraction form
    57,971.40/79,963.36 = 39,813.36/x
  3. Step 3: Cross multiply
    57,971.40x = 79,963.36 × 39,813.36
  4. Step 4: Simplify right side
    57,971.40x = 3,183,610,038.49
  5. Step 5: Solve for x
    x = 3,183,610,038.49/57,971.40
  6. Step 6: Final answer
    x = 54,916.91

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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.