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Finding the Fourth Proportional to 50,643.90, 69,885.99 and 28,287.90

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Solution

The fourth proportional to 50,643.90, 69,885.99 and 28,287.90 is: 39,035.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,643.90 : 69,885.99 = 28,287.90 : x
  2. Step 2: Convert to fraction form
    50,643.90/69,885.99 = 28,287.90/x
  3. Step 3: Cross multiply
    50,643.90x = 69,885.99 × 28,287.90
  4. Step 4: Simplify right side
    50,643.90x = 1,976,927,896.52
  5. Step 5: Solve for x
    x = 1,976,927,896.52/50,643.90
  6. Step 6: Final answer
    x = 39,035.85

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1.5x scale

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.