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Finding the Fourth Proportional to 272,400.45, 408,512.70 and 99,267.51

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Solution

The fourth proportional to 272,400.45, 408,512.70 and 99,267.51 is: 148,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,400.45 : 408,512.70 = 99,267.51 : x
  2. Step 2: Convert to fraction form
    272,400.45/408,512.70 = 99,267.51/x
  3. Step 3: Cross multiply
    272,400.45x = 408,512.70 × 99,267.51
  4. Step 4: Simplify right side
    272,400.45x = 40,552,038,532.38
  5. Step 5: Solve for x
    x = 40,552,038,532.38/272,400.45
  6. Step 6: Final answer
    x = 148,869.21

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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.