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Finding the Fourth Proportional to 73,866.48, 102,623.91 and 72,980.75

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Solution

The fourth proportional to 73,866.48, 102,623.91 and 72,980.75 is: 101,393.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,866.48 : 102,623.91 = 72,980.75 : x
  2. Step 2: Convert to fraction form
    73,866.48/102,623.91 = 72,980.75/x
  3. Step 3: Cross multiply
    73,866.48x = 102,623.91 × 72,980.75
  4. Step 4: Simplify right side
    73,866.48x = 7,489,569,406.61
  5. Step 5: Solve for x
    x = 7,489,569,406.61/73,866.48
  6. Step 6: Final answer
    x = 101,393.34

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.