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Finding the Fourth Proportional to 183,685.20, 275,527.80 and 78,709.20

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Solution

The fourth proportional to 183,685.20, 275,527.80 and 78,709.20 is: 118,063.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,685.20 : 275,527.80 = 78,709.20 : x
  2. Step 2: Convert to fraction form
    183,685.20/275,527.80 = 78,709.20/x
  3. Step 3: Cross multiply
    183,685.20x = 275,527.80 × 78,709.20
  4. Step 4: Simplify right side
    183,685.20x = 21,686,572,715.76
  5. Step 5: Solve for x
    x = 21,686,572,715.76/183,685.20
  6. Step 6: Final answer
    x = 118,063.80

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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.