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Finding the Fourth Proportional to 72,450, 99,946.98 and 51,240.96

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Solution

The fourth proportional to 72,450, 99,946.98 and 51,240.96 is: 70,688.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,450 : 99,946.98 = 51,240.96 : x
  2. Step 2: Convert to fraction form
    72,450/99,946.98 = 51,240.96/x
  3. Step 3: Cross multiply
    72,450x = 99,946.98 × 51,240.96
  4. Step 4: Simplify right side
    72,450x = 5,121,379,204.30
  5. Step 5: Solve for x
    x = 5,121,379,204.30/72,450
  6. Step 6: Final answer
    x = 70,688.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.