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Finding the Fourth Proportional to 219,618.51, 303,106.05 and 139,053.51

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Solution

The fourth proportional to 219,618.51, 303,106.05 and 139,053.51 is: 191,914.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,618.51 : 303,106.05 = 139,053.51 : x
  2. Step 2: Convert to fraction form
    219,618.51/303,106.05 = 139,053.51/x
  3. Step 3: Cross multiply
    219,618.51x = 303,106.05 × 139,053.51
  4. Step 4: Simplify right side
    219,618.51x = 42,147,960,154.74
  5. Step 5: Solve for x
    x = 42,147,960,154.74/219,618.51
  6. Step 6: Final answer
    x = 191,914.43

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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.