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Finding the Fourth Proportional to 129,877, 179,230.50 and 70,261

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Solution

The fourth proportional to 129,877, 179,230.50 and 70,261 is: 96,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,877 : 179,230.50 = 70,261 : x
  2. Step 2: Convert to fraction form
    129,877/179,230.50 = 70,261/x
  3. Step 3: Cross multiply
    129,877x = 179,230.50 × 70,261
  4. Step 4: Simplify right side
    129,877x = 12,592,914,160.50
  5. Step 5: Solve for x
    x = 12,592,914,160.50/129,877
  6. Step 6: Final answer
    x = 96,960.31

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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.