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Finding the Fourth Proportional to 145,340.20, 200,571.42 and 81,674.20

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Solution

The fourth proportional to 145,340.20, 200,571.42 and 81,674.20 is: 112,711.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,340.20 : 200,571.42 = 81,674.20 : x
  2. Step 2: Convert to fraction form
    145,340.20/200,571.42 = 81,674.20/x
  3. Step 3: Cross multiply
    145,340.20x = 200,571.42 × 81,674.20
  4. Step 4: Simplify right side
    145,340.20x = 16,381,510,271.36
  5. Step 5: Solve for x
    x = 16,381,510,271.36/145,340.20
  6. Step 6: Final answer
    x = 112,711.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.