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Finding the Fourth Proportional to 129,835, 179,172.30 and 70,219

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Solution

The fourth proportional to 129,835, 179,172.30 and 70,219 is: 96,902.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,835 : 179,172.30 = 70,219 : x
  2. Step 2: Convert to fraction form
    129,835/179,172.30 = 70,219/x
  3. Step 3: Cross multiply
    129,835x = 179,172.30 × 70,219
  4. Step 4: Simplify right side
    129,835x = 12,581,299,733.70
  5. Step 5: Solve for x
    x = 12,581,299,733.70/129,835
  6. Step 6: Final answer
    x = 96,902.22

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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.