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Finding the Fourth Proportional to 213,458.32, 320,187.48 and 80,368.44

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Solution

The fourth proportional to 213,458.32, 320,187.48 and 80,368.44 is: 120,552.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,458.32 : 320,187.48 = 80,368.44 : x
  2. Step 2: Convert to fraction form
    213,458.32/320,187.48 = 80,368.44/x
  3. Step 3: Cross multiply
    213,458.32x = 320,187.48 × 80,368.44
  4. Step 4: Simplify right side
    213,458.32x = 25,732,968,275.13
  5. Step 5: Solve for x
    x = 25,732,968,275.13/213,458.32
  6. Step 6: Final answer
    x = 120,552.66

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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.