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Finding the Fourth Proportional to 177,721.60, 266,485.20 and 72,421.60

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Solution

The fourth proportional to 177,721.60, 266,485.20 and 72,421.60 is: 108,592.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,721.60 : 266,485.20 = 72,421.60 : x
  2. Step 2: Convert to fraction form
    177,721.60/266,485.20 = 72,421.60/x
  3. Step 3: Cross multiply
    177,721.60x = 266,485.20 × 72,421.60
  4. Step 4: Simplify right side
    177,721.60x = 19,299,284,560.32
  5. Step 5: Solve for x
    x = 19,299,284,560.32/177,721.60
  6. Step 6: Final answer
    x = 108,592.79

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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.