Home / 85,521.45-128,227.84-75,012.57

Finding the Fourth Proportional to 85,521.45, 128,227.84 and 75,012.57

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Solution

The fourth proportional to 85,521.45, 128,227.84 and 75,012.57 is: 112,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,521.45 : 128,227.84 = 75,012.57 : x
  2. Step 2: Convert to fraction form
    85,521.45/128,227.84 = 75,012.57/x
  3. Step 3: Cross multiply
    85,521.45x = 128,227.84 × 75,012.57
  4. Step 4: Simplify right side
    85,521.45x = 9,618,699,823.95
  5. Step 5: Solve for x
    x = 9,618,699,823.95/85,521.45
  6. Step 6: Final answer
    x = 112,471.20

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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.