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Finding the Fourth Proportional to 177,685.60, 266,431.20 and 72,385.60

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Solution

The fourth proportional to 177,685.60, 266,431.20 and 72,385.60 is: 108,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,685.60 : 266,431.20 = 72,385.60 : x
  2. Step 2: Convert to fraction form
    177,685.60/266,431.20 = 72,385.60/x
  3. Step 3: Cross multiply
    177,685.60x = 266,431.20 × 72,385.60
  4. Step 4: Simplify right side
    177,685.60x = 19,285,782,270.72
  5. Step 5: Solve for x
    x = 19,285,782,270.72/177,685.60
  6. Step 6: Final answer
    x = 108,538.80

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1.5x scale

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.