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Finding the Fourth Proportional to 129,719, 179,012.22 and 70,103

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Solution

The fourth proportional to 129,719, 179,012.22 and 70,103 is: 96,742.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,719 : 179,012.22 = 70,103 : x
  2. Step 2: Convert to fraction form
    129,719/179,012.22 = 70,103/x
  3. Step 3: Cross multiply
    129,719x = 179,012.22 × 70,103
  4. Step 4: Simplify right side
    129,719x = 12,549,293,658.66
  5. Step 5: Solve for x
    x = 12,549,293,658.66/129,719
  6. Step 6: Final answer
    x = 96,742.14

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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.