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Finding the Fourth Proportional to 133,639.80, 200,459.70 and 40,133.40

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Solution

The fourth proportional to 133,639.80, 200,459.70 and 40,133.40 is: 60,200.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,639.80 : 200,459.70 = 40,133.40 : x
  2. Step 2: Convert to fraction form
    133,639.80/200,459.70 = 40,133.40/x
  3. Step 3: Cross multiply
    133,639.80x = 200,459.70 × 40,133.40
  4. Step 4: Simplify right side
    133,639.80x = 8,045,129,323.98
  5. Step 5: Solve for x
    x = 8,045,129,323.98/133,639.80
  6. Step 6: Final answer
    x = 60,200.10

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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.