Home / 85,767.12-128,617.20-28,829.52

Finding the Fourth Proportional to 85,767.12, 128,617.20 and 28,829.52

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Solution

The fourth proportional to 85,767.12, 128,617.20 and 28,829.52 is: 43,233.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,767.12 : 128,617.20 = 28,829.52 : x
  2. Step 2: Convert to fraction form
    85,767.12/128,617.20 = 28,829.52/x
  3. Step 3: Cross multiply
    85,767.12x = 128,617.20 × 28,829.52
  4. Step 4: Simplify right side
    85,767.12x = 3,707,972,139.74
  5. Step 5: Solve for x
    x = 3,707,972,139.74/85,767.12
  6. Step 6: Final answer
    x = 43,233.03

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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.