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Finding the Fourth Proportional to 145,604.55, 200,901.02 and 81,919.11

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Solution

The fourth proportional to 145,604.55, 200,901.02 and 81,919.11 is: 113,029.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,604.55 : 200,901.02 = 81,919.11 : x
  2. Step 2: Convert to fraction form
    145,604.55/200,901.02 = 81,919.11/x
  3. Step 3: Cross multiply
    145,604.55x = 200,901.02 × 81,919.11
  4. Step 4: Simplify right side
    145,604.55x = 16,457,632,756.49
  5. Step 5: Solve for x
    x = 16,457,632,756.49/145,604.55
  6. Step 6: Final answer
    x = 113,029.66

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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.