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Finding the Fourth Proportional to 258,777.45, 387,935.33 and 100,969.20

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Solution

The fourth proportional to 258,777.45, 387,935.33 and 100,969.20 is: 151,363.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,777.45 : 387,935.33 = 100,969.20 : x
  2. Step 2: Convert to fraction form
    258,777.45/387,935.33 = 100,969.20/x
  3. Step 3: Cross multiply
    258,777.45x = 387,935.33 × 100,969.20
  4. Step 4: Simplify right side
    258,777.45x = 39,169,519,416.99
  5. Step 5: Solve for x
    x = 39,169,519,416.99/258,777.45
  6. Step 6: Final answer
    x = 151,363.73

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1.5x scale

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.