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Finding the Fourth Proportional to 68,538,400.80, 102,975,562.80 and 51,532,288.80

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Solution

The fourth proportional to 68,538,400.80, 102,975,562.80 and 51,532,288.80 is: 77,424,719.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,538,400.80 : 102,975,562.80 = 51,532,288.80 : x
  2. Step 2: Convert to fraction form
    68,538,400.80/102,975,562.80 = 51,532,288.80/x
  3. Step 3: Cross multiply
    68,538,400.80x = 102,975,562.80 × 51,532,288.80
  4. Step 4: Simplify right side
    68,538,400.80x = 5,306,566,441,552,136
  5. Step 5: Solve for x
    x = 5,306,566,441,552,136/68,538,400.80
  6. Step 6: Final answer
    x = 77,424,719.28

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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.