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Finding the Fourth Proportional to 129,749, 179,053.64 and 70,133

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Solution

The fourth proportional to 129,749, 179,053.64 and 70,133 is: 96,783.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,749 : 179,053.64 = 70,133 : x
  2. Step 2: Convert to fraction form
    129,749/179,053.64 = 70,133/x
  3. Step 3: Cross multiply
    129,749x = 179,053.64 × 70,133
  4. Step 4: Simplify right side
    129,749x = 12,557,568,934.12
  5. Step 5: Solve for x
    x = 12,557,568,934.12/129,749
  6. Step 6: Final answer
    x = 96,783.55

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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.