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Finding the Fourth Proportional to 129,899, 179,260.62 and 70,283

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Solution

The fourth proportional to 129,899, 179,260.62 and 70,283 is: 96,990.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,899 : 179,260.62 = 70,283 : x
  2. Step 2: Convert to fraction form
    129,899/179,260.62 = 70,283/x
  3. Step 3: Cross multiply
    129,899x = 179,260.62 × 70,283
  4. Step 4: Simplify right side
    129,899x = 12,598,974,155.46
  5. Step 5: Solve for x
    x = 12,598,974,155.46/129,899
  6. Step 6: Final answer
    x = 96,990.54

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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.