Home / 85,431.12-128,098.68-35,477.61

Finding the Fourth Proportional to 85,431.12, 128,098.68 and 35,477.61

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Solution

The fourth proportional to 85,431.12, 128,098.68 and 35,477.61 is: 53,196.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,431.12 : 128,098.68 = 35,477.61 : x
  2. Step 2: Convert to fraction form
    85,431.12/128,098.68 = 35,477.61/x
  3. Step 3: Cross multiply
    85,431.12x = 128,098.68 × 35,477.61
  4. Step 4: Simplify right side
    85,431.12x = 4,544,635,010.55
  5. Step 5: Solve for x
    x = 4,544,635,010.55/85,431.12
  6. Step 6: Final answer
    x = 53,196.48

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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.