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Finding the Fourth Proportional to 207,987.30, 312,059.10 and 123,795.90

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Solution

The fourth proportional to 207,987.30, 312,059.10 and 123,795.90 is: 185,740.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,987.30 : 312,059.10 = 123,795.90 : x
  2. Step 2: Convert to fraction form
    207,987.30/312,059.10 = 123,795.90/x
  3. Step 3: Cross multiply
    207,987.30x = 312,059.10 × 123,795.90
  4. Step 4: Simplify right side
    207,987.30x = 38,631,637,137.69
  5. Step 5: Solve for x
    x = 38,631,637,137.69/207,987.30
  6. Step 6: Final answer
    x = 185,740.37

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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.