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Finding the Fourth Proportional to 485,199.39, 727,698.84 and 130,129

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Solution

The fourth proportional to 485,199.39, 727,698.84 and 130,129 is: 195,166.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,199.39 : 727,698.84 = 130,129 : x
  2. Step 2: Convert to fraction form
    485,199.39/727,698.84 = 130,129/x
  3. Step 3: Cross multiply
    485,199.39x = 727,698.84 × 130,129
  4. Step 4: Simplify right side
    485,199.39x = 94,694,722,350.36
  5. Step 5: Solve for x
    x = 94,694,722,350.36/485,199.39
  6. Step 6: Final answer
    x = 195,166.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.