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Finding the Fourth Proportional to 129,756.52, 179,033.43 and 78,768.01

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Solution

The fourth proportional to 129,756.52, 179,033.43 and 78,768.01 is: 108,681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,756.52 : 179,033.43 = 78,768.01 : x
  2. Step 2: Convert to fraction form
    129,756.52/179,033.43 = 78,768.01/x
  3. Step 3: Cross multiply
    129,756.52x = 179,033.43 × 78,768.01
  4. Step 4: Simplify right side
    129,756.52x = 14,102,107,004.57
  5. Step 5: Solve for x
    x = 14,102,107,004.57/129,756.52
  6. Step 6: Final answer
    x = 108,681.30

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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.