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Finding the Fourth Proportional to 186,332.19, 278,639.88 and 138,391.39

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Solution

The fourth proportional to 186,332.19, 278,639.88 and 138,391.39 is: 206,949.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,332.19 : 278,639.88 = 138,391.39 : x
  2. Step 2: Convert to fraction form
    186,332.19/278,639.88 = 138,391.39/x
  3. Step 3: Cross multiply
    186,332.19x = 278,639.88 × 138,391.39
  4. Step 4: Simplify right side
    186,332.19x = 38,561,360,302.63
  5. Step 5: Solve for x
    x = 38,561,360,302.63/186,332.19
  6. Step 6: Final answer
    x = 206,949.54

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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.