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Finding the Fourth Proportional to 219,517.83, 302,893.56 and 138,888.81

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Solution

The fourth proportional to 219,517.83, 302,893.56 and 138,888.81 is: 191,640.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,517.83 : 302,893.56 = 138,888.81 : x
  2. Step 2: Convert to fraction form
    219,517.83/302,893.56 = 138,888.81/x
  3. Step 3: Cross multiply
    219,517.83x = 302,893.56 × 138,888.81
  4. Step 4: Simplify right side
    219,517.83x = 42,068,526,105.06
  5. Step 5: Solve for x
    x = 42,068,526,105.06/219,517.83
  6. Step 6: Final answer
    x = 191,640.59

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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.