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Finding the Fourth Proportional to 129,769, 179,081.46 and 70,153

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Solution

The fourth proportional to 129,769, 179,081.46 and 70,153 is: 96,811.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,769 : 179,081.46 = 70,153 : x
  2. Step 2: Convert to fraction form
    129,769/179,081.46 = 70,153/x
  3. Step 3: Cross multiply
    129,769x = 179,081.46 × 70,153
  4. Step 4: Simplify right side
    129,769x = 12,563,101,663.38
  5. Step 5: Solve for x
    x = 12,563,101,663.38/129,769
  6. Step 6: Final answer
    x = 96,811.27

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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.