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Finding the Fourth Proportional to 177,681.20, 266,521.80 and 72,442.80

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Solution

The fourth proportional to 177,681.20, 266,521.80 and 72,442.80 is: 108,664.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,681.20 : 266,521.80 = 72,442.80 : x
  2. Step 2: Convert to fraction form
    177,681.20/266,521.80 = 72,442.80/x
  3. Step 3: Cross multiply
    177,681.20x = 266,521.80 × 72,442.80
  4. Step 4: Simplify right side
    177,681.20x = 19,307,585,453.04
  5. Step 5: Solve for x
    x = 19,307,585,453.04/177,681.20
  6. Step 6: Final answer
    x = 108,664.20

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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.