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Finding the Fourth Proportional to 129,759.56, 179,068.20 and 70,143.56

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Solution

The fourth proportional to 129,759.56, 179,068.20 and 70,143.56 is: 96,798.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,759.56 : 179,068.20 = 70,143.56 : x
  2. Step 2: Convert to fraction form
    129,759.56/179,068.20 = 70,143.56/x
  3. Step 3: Cross multiply
    129,759.56x = 179,068.20 × 70,143.56
  4. Step 4: Simplify right side
    129,759.56x = 12,560,481,030.79
  5. Step 5: Solve for x
    x = 12,560,481,030.79/129,759.56
  6. Step 6: Final answer
    x = 96,798.12

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1.5x scale

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.