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Finding the Fourth Proportional to 206,940.20, 310,483.20 and 101,688.80

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Solution

The fourth proportional to 206,940.20, 310,483.20 and 101,688.80 is: 152,569.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,940.20 : 310,483.20 = 101,688.80 : x
  2. Step 2: Convert to fraction form
    206,940.20/310,483.20 = 101,688.80/x
  3. Step 3: Cross multiply
    206,940.20x = 310,483.20 × 101,688.80
  4. Step 4: Simplify right side
    206,940.20x = 31,572,664,028.16
  5. Step 5: Solve for x
    x = 31,572,664,028.16/206,940.20
  6. Step 6: Final answer
    x = 152,569.02

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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.