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Finding the Fourth Proportional to 85,032.40, 127,521.40 and 28,093.68

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Solution

The fourth proportional to 85,032.40, 127,521.40 and 28,093.68 is: 42,131.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,032.40 : 127,521.40 = 28,093.68 : x
  2. Step 2: Convert to fraction form
    85,032.40/127,521.40 = 28,093.68/x
  3. Step 3: Cross multiply
    85,032.40x = 127,521.40 × 28,093.68
  4. Step 4: Simplify right side
    85,032.40x = 3,582,545,404.75
  5. Step 5: Solve for x
    x = 3,582,545,404.75/85,032.40
  6. Step 6: Final answer
    x = 42,131.53

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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.