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Finding the Fourth Proportional to 129,935, 179,311.38 and 70,319

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Solution

The fourth proportional to 129,935, 179,311.38 and 70,319 is: 97,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,935 : 179,311.38 = 70,319 : x
  2. Step 2: Convert to fraction form
    129,935/179,311.38 = 70,319/x
  3. Step 3: Cross multiply
    129,935x = 179,311.38 × 70,319
  4. Step 4: Simplify right side
    129,935x = 12,608,996,930.22
  5. Step 5: Solve for x
    x = 12,608,996,930.22/129,935
  6. Step 6: Final answer
    x = 97,040.80

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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.