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Finding the Fourth Proportional to 78,977.55, 108,988.75 and 43,167.54

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Solution

The fourth proportional to 78,977.55, 108,988.75 and 43,167.54 is: 59,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,977.55 : 108,988.75 = 43,167.54 : x
  2. Step 2: Convert to fraction form
    78,977.55/108,988.75 = 43,167.54/x
  3. Step 3: Cross multiply
    78,977.55x = 108,988.75 × 43,167.54
  4. Step 4: Simplify right side
    78,977.55x = 4,704,775,572.31
  5. Step 5: Solve for x
    x = 4,704,775,572.31/78,977.55
  6. Step 6: Final answer
    x = 59,571.05

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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.