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Finding the Fourth Proportional to 85,520.95, 128,227.09 and 75,012.07

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Solution

The fourth proportional to 85,520.95, 128,227.09 and 75,012.07 is: 112,470.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.95 : 128,227.09 = 75,012.07 : x
  2. Step 2: Convert to fraction form
    85,520.95/128,227.09 = 75,012.07/x
  3. Step 3: Cross multiply
    85,520.95x = 128,227.09 × 75,012.07
  4. Step 4: Simplify right side
    85,520.95x = 9,618,579,450.98
  5. Step 5: Solve for x
    x = 9,618,579,450.98/85,520.95
  6. Step 6: Final answer
    x = 112,470.45

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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.