Home / 85,578.28-128,397.82-38,189.06

Finding the Fourth Proportional to 85,578.28, 128,397.82 and 38,189.06

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Solution

The fourth proportional to 85,578.28, 128,397.82 and 38,189.06 is: 57,297.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,578.28 : 128,397.82 = 38,189.06 : x
  2. Step 2: Convert to fraction form
    85,578.28/128,397.82 = 38,189.06/x
  3. Step 3: Cross multiply
    85,578.28x = 128,397.82 × 38,189.06
  4. Step 4: Simplify right side
    85,578.28x = 4,903,392,051.85
  5. Step 5: Solve for x
    x = 4,903,392,051.85/85,578.28
  6. Step 6: Final answer
    x = 57,297.16

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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.