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Finding the Fourth Proportional to 230,372.10, 317,891.25 and 138,518.10

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Solution

The fourth proportional to 230,372.10, 317,891.25 and 138,518.10 is: 191,141.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,372.10 : 317,891.25 = 138,518.10 : x
  2. Step 2: Convert to fraction form
    230,372.10/317,891.25 = 138,518.10/x
  3. Step 3: Cross multiply
    230,372.10x = 317,891.25 × 138,518.10
  4. Step 4: Simplify right side
    230,372.10x = 44,033,691,956.63
  5. Step 5: Solve for x
    x = 44,033,691,956.63/230,372.10
  6. Step 6: Final answer
    x = 191,141.60

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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.