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Finding the Fourth Proportional to 134,109.70, 201,294.15 and 81,621.70

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Solution

The fourth proportional to 134,109.70, 201,294.15 and 81,621.70 is: 122,511.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,109.70 : 201,294.15 = 81,621.70 : x
  2. Step 2: Convert to fraction form
    134,109.70/201,294.15 = 81,621.70/x
  3. Step 3: Cross multiply
    134,109.70x = 201,294.15 × 81,621.70
  4. Step 4: Simplify right side
    134,109.70x = 16,429,970,723.06
  5. Step 5: Solve for x
    x = 16,429,970,723.06/134,109.70
  6. Step 6: Final answer
    x = 122,511.43

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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.