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Finding the Fourth Proportional to 219,309.81, 302,695.49 and 138,844.60

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Solution

The fourth proportional to 219,309.81, 302,695.49 and 138,844.60 is: 191,635.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,309.81 : 302,695.49 = 138,844.60 : x
  2. Step 2: Convert to fraction form
    219,309.81/302,695.49 = 138,844.60/x
  3. Step 3: Cross multiply
    219,309.81x = 302,695.49 × 138,844.60
  4. Step 4: Simplify right side
    219,309.81x = 42,027,634,230.85
  5. Step 5: Solve for x
    x = 42,027,634,230.85/219,309.81
  6. Step 6: Final answer
    x = 191,635.91

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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.