Home / 85,819.42-128,708.61-29,661.51

Finding the Fourth Proportional to 85,819.42, 128,708.61 and 29,661.51

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Solution

The fourth proportional to 85,819.42, 128,708.61 and 29,661.51 is: 44,485.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.42 : 128,708.61 = 29,661.51 : x
  2. Step 2: Convert to fraction form
    85,819.42/128,708.61 = 29,661.51/x
  3. Step 3: Cross multiply
    85,819.42x = 128,708.61 × 29,661.51
  4. Step 4: Simplify right side
    85,819.42x = 3,817,691,722.60
  5. Step 5: Solve for x
    x = 3,817,691,722.60/85,819.42
  6. Step 6: Final answer
    x = 44,485.17

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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.