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Finding the Fourth Proportional to 109,425.72, 164,135.34 and 45,377.40

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Solution

The fourth proportional to 109,425.72, 164,135.34 and 45,377.40 is: 68,064.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,425.72 : 164,135.34 = 45,377.40 : x
  2. Step 2: Convert to fraction form
    109,425.72/164,135.34 = 45,377.40/x
  3. Step 3: Cross multiply
    109,425.72x = 164,135.34 × 45,377.40
  4. Step 4: Simplify right side
    109,425.72x = 7,448,034,977.32
  5. Step 5: Solve for x
    x = 7,448,034,977.32/109,425.72
  6. Step 6: Final answer
    x = 68,064.76

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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.