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Finding the Fourth Proportional to 192,340.40, 288,510.60 and 85,724.15

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Solution

The fourth proportional to 192,340.40, 288,510.60 and 85,724.15 is: 128,586.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,340.40 : 288,510.60 = 85,724.15 : x
  2. Step 2: Convert to fraction form
    192,340.40/288,510.60 = 85,724.15/x
  3. Step 3: Cross multiply
    192,340.40x = 288,510.60 × 85,724.15
  4. Step 4: Simplify right side
    192,340.40x = 24,732,325,950.99
  5. Step 5: Solve for x
    x = 24,732,325,950.99/192,340.40
  6. Step 6: Final answer
    x = 128,586.23

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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.