Home / 85,495.30-128,235.35-38,112.73

Finding the Fourth Proportional to 85,495.30, 128,235.35 and 38,112.73

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Solution

The fourth proportional to 85,495.30, 128,235.35 and 38,112.73 is: 57,165.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,495.30 : 128,235.35 = 38,112.73 : x
  2. Step 2: Convert to fraction form
    85,495.30/128,235.35 = 38,112.73/x
  3. Step 3: Cross multiply
    85,495.30x = 128,235.35 × 38,112.73
  4. Step 4: Simplify right side
    85,495.30x = 4,887,399,045.70
  5. Step 5: Solve for x
    x = 4,887,399,045.70/85,495.30
  6. Step 6: Final answer
    x = 57,165.71

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1.5x scale

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.