Home / 85,894.08-128,788.20-29,721.12

Finding the Fourth Proportional to 85,894.08, 128,788.20 and 29,721.12

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Solution

The fourth proportional to 85,894.08, 128,788.20 and 29,721.12 is: 44,563.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,894.08 : 128,788.20 = 29,721.12 : x
  2. Step 2: Convert to fraction form
    85,894.08/128,788.20 = 29,721.12/x
  3. Step 3: Cross multiply
    85,894.08x = 128,788.20 × 29,721.12
  4. Step 4: Simplify right side
    85,894.08x = 3,827,729,546.78
  5. Step 5: Solve for x
    x = 3,827,729,546.78/85,894.08
  6. Step 6: Final answer
    x = 44,563.37

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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.