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Finding the Fourth Proportional to 129,809.52, 179,075.70 and 84,470.96

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Solution

The fourth proportional to 129,809.52, 179,075.70 and 84,470.96 is: 116,529.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,809.52 : 179,075.70 = 84,470.96 : x
  2. Step 2: Convert to fraction form
    129,809.52/179,075.70 = 84,470.96/x
  3. Step 3: Cross multiply
    129,809.52x = 179,075.70 × 84,470.96
  4. Step 4: Simplify right side
    129,809.52x = 15,126,695,396.29
  5. Step 5: Solve for x
    x = 15,126,695,396.29/129,809.52
  6. Step 6: Final answer
    x = 116,529.94

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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.