Home / 85,821.04-128,758.43-38,475.83

Finding the Fourth Proportional to 85,821.04, 128,758.43 and 38,475.83

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Solution

The fourth proportional to 85,821.04, 128,758.43 and 38,475.83 is: 57,725.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,821.04 : 128,758.43 = 38,475.83 : x
  2. Step 2: Convert to fraction form
    85,821.04/128,758.43 = 38,475.83/x
  3. Step 3: Cross multiply
    85,821.04x = 128,758.43 × 38,475.83
  4. Step 4: Simplify right side
    85,821.04x = 4,954,087,463.75
  5. Step 5: Solve for x
    x = 4,954,087,463.75/85,821.04
  6. Step 6: Final answer
    x = 57,725.79

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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.