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Finding the Fourth Proportional to 177,890.40, 266,986.80 and 72,784.80

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Solution

The fourth proportional to 177,890.40, 266,986.80 and 72,784.80 is: 109,239.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,890.40 : 266,986.80 = 72,784.80 : x
  2. Step 2: Convert to fraction form
    177,890.40/266,986.80 = 72,784.80/x
  3. Step 3: Cross multiply
    177,890.40x = 266,986.80 × 72,784.80
  4. Step 4: Simplify right side
    177,890.40x = 19,432,580,840.64
  5. Step 5: Solve for x
    x = 19,432,580,840.64/177,890.40
  6. Step 6: Final answer
    x = 109,239.06

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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.