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Finding the Fourth Proportional to 186,101.65, 278,983.54 and 67,689.28

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Solution

The fourth proportional to 186,101.65, 278,983.54 and 67,689.28 is: 101,472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,101.65 : 278,983.54 = 67,689.28 : x
  2. Step 2: Convert to fraction form
    186,101.65/278,983.54 = 67,689.28/x
  3. Step 3: Cross multiply
    186,101.65x = 278,983.54 × 67,689.28
  4. Step 4: Simplify right side
    186,101.65x = 18,884,194,954.45
  5. Step 5: Solve for x
    x = 18,884,194,954.45/186,101.65
  6. Step 6: Final answer
    x = 101,472.47

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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.