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Finding the Fourth Proportional to 186,638.56, 279,792.06 and 72,760.12

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Solution

The fourth proportional to 186,638.56, 279,792.06 and 72,760.12 is: 109,075.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,638.56 : 279,792.06 = 72,760.12 : x
  2. Step 2: Convert to fraction form
    186,638.56/279,792.06 = 72,760.12/x
  3. Step 3: Cross multiply
    186,638.56x = 279,792.06 × 72,760.12
  4. Step 4: Simplify right side
    186,638.56x = 20,357,703,860.65
  5. Step 5: Solve for x
    x = 20,357,703,860.65/186,638.56
  6. Step 6: Final answer
    x = 109,075.55

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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.