Home / 85,645.11-128,476.30-29,477.82

Finding the Fourth Proportional to 85,645.11, 128,476.30 and 29,477.82

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Solution

The fourth proportional to 85,645.11, 128,476.30 and 29,477.82 is: 44,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,645.11 : 128,476.30 = 29,477.82 : x
  2. Step 2: Convert to fraction form
    85,645.11/128,476.30 = 29,477.82/x
  3. Step 3: Cross multiply
    85,645.11x = 128,476.30 × 29,477.82
  4. Step 4: Simplify right side
    85,645.11x = 3,787,201,245.67
  5. Step 5: Solve for x
    x = 3,787,201,245.67/85,645.11
  6. Step 6: Final answer
    x = 44,219.70

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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.