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Finding the Fourth Proportional to 130,185.45, 179,647.45 and 72,814.84

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Solution

The fourth proportional to 130,185.45, 179,647.45 and 72,814.84 is: 100,479.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,185.45 : 179,647.45 = 72,814.84 : x
  2. Step 2: Convert to fraction form
    130,185.45/179,647.45 = 72,814.84/x
  3. Step 3: Cross multiply
    130,185.45x = 179,647.45 × 72,814.84
  4. Step 4: Simplify right side
    130,185.45x = 13,080,999,429.92
  5. Step 5: Solve for x
    x = 13,080,999,429.92/130,185.45
  6. Step 6: Final answer
    x = 100,479.73

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1.5x scale

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.