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Finding the Fourth Proportional to 219,673.74, 303,140.14 and 129,039

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Solution

The fourth proportional to 219,673.74, 303,140.14 and 129,039 is: 178,068.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,673.74 : 303,140.14 = 129,039 : x
  2. Step 2: Convert to fraction form
    219,673.74/303,140.14 = 129,039/x
  3. Step 3: Cross multiply
    219,673.74x = 303,140.14 × 129,039
  4. Step 4: Simplify right side
    219,673.74x = 39,116,900,525.46
  5. Step 5: Solve for x
    x = 39,116,900,525.46/219,673.74
  6. Step 6: Final answer
    x = 178,068.17

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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.