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Finding the Fourth Proportional to 147,458.72, 203,493.12 and 80,390.72

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Solution

The fourth proportional to 147,458.72, 203,493.12 and 80,390.72 is: 110,939.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,458.72 : 203,493.12 = 80,390.72 : x
  2. Step 2: Convert to fraction form
    147,458.72/203,493.12 = 80,390.72/x
  3. Step 3: Cross multiply
    147,458.72x = 203,493.12 × 80,390.72
  4. Step 4: Simplify right side
    147,458.72x = 16,358,958,431.85
  5. Step 5: Solve for x
    x = 16,358,958,431.85/147,458.72
  6. Step 6: Final answer
    x = 110,939.24

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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.