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Finding the Fourth Proportional to 78,969.08, 108,977.45 and 43,159.11

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Solution

The fourth proportional to 78,969.08, 108,977.45 and 43,159.11 is: 59,559.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,969.08 : 108,977.45 = 43,159.11 : x
  2. Step 2: Convert to fraction form
    78,969.08/108,977.45 = 43,159.11/x
  3. Step 3: Cross multiply
    78,969.08x = 108,977.45 × 43,159.11
  4. Step 4: Simplify right side
    78,969.08x = 4,703,369,536.27
  5. Step 5: Solve for x
    x = 4,703,369,536.27/78,969.08
  6. Step 6: Final answer
    x = 59,559.64

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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.