Home / 219,872.12-303,612.90-138,336.32

Finding the Fourth Proportional to 219,872.12, 303,612.90 and 138,336.32

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Solution

The fourth proportional to 219,872.12, 303,612.90 and 138,336.32 is: 191,023.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,872.12 : 303,612.90 = 138,336.32 : x
  2. Step 2: Convert to fraction form
    219,872.12/303,612.90 = 138,336.32/x
  3. Step 3: Cross multiply
    219,872.12x = 303,612.90 × 138,336.32
  4. Step 4: Simplify right side
    219,872.12x = 42,000,689,426.62
  5. Step 5: Solve for x
    x = 42,000,689,426.62/219,872.12
  6. Step 6: Final answer
    x = 191,023.26

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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.