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Finding the Fourth Proportional to 129,768, 179,080.08 and 70,152

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Solution

The fourth proportional to 129,768, 179,080.08 and 70,152 is: 96,809.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,768 : 179,080.08 = 70,152 : x
  2. Step 2: Convert to fraction form
    129,768/179,080.08 = 70,152/x
  3. Step 3: Cross multiply
    129,768x = 179,080.08 × 70,152
  4. Step 4: Simplify right side
    129,768x = 12,562,825,772.16
  5. Step 5: Solve for x
    x = 12,562,825,772.16/129,768
  6. Step 6: Final answer
    x = 96,809.89

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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.