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Finding the Fourth Proportional to 129,775, 179,089.74 and 70,159

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Solution

The fourth proportional to 129,775, 179,089.74 and 70,159 is: 96,819.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,775 : 179,089.74 = 70,159 : x
  2. Step 2: Convert to fraction form
    129,775/179,089.74 = 70,159/x
  3. Step 3: Cross multiply
    129,775x = 179,089.74 × 70,159
  4. Step 4: Simplify right side
    129,775x = 12,564,757,068.66
  5. Step 5: Solve for x
    x = 12,564,757,068.66/129,775
  6. Step 6: Final answer
    x = 96,819.55

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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.