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Finding the Fourth Proportional to 78,969.66, 108,977.87 and 43,159.66

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Solution

The fourth proportional to 78,969.66, 108,977.87 and 43,159.66 is: 59,560.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,969.66 : 108,977.87 = 43,159.66 : x
  2. Step 2: Convert to fraction form
    78,969.66/108,977.87 = 43,159.66/x
  3. Step 3: Cross multiply
    78,969.66x = 108,977.87 × 43,159.66
  4. Step 4: Simplify right side
    78,969.66x = 4,703,447,708.83
  5. Step 5: Solve for x
    x = 4,703,447,708.83/78,969.66
  6. Step 6: Final answer
    x = 59,560.19

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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.