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Finding the Fourth Proportional to 57,006.88, 78,667.72 and 31,511.72

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Solution

The fourth proportional to 57,006.88, 78,667.72 and 31,511.72 is: 43,485.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,006.88 : 78,667.72 = 31,511.72 : x
  2. Step 2: Convert to fraction form
    57,006.88/78,667.72 = 31,511.72/x
  3. Step 3: Cross multiply
    57,006.88x = 78,667.72 × 31,511.72
  4. Step 4: Simplify right side
    57,006.88x = 2,478,955,165.68
  5. Step 5: Solve for x
    x = 2,478,955,165.68/57,006.88
  6. Step 6: Final answer
    x = 43,485.19

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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.