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Finding the Fourth Proportional to 50,642.90, 69,888.94 and 31,790.42

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Solution

The fourth proportional to 50,642.90, 69,888.94 and 31,790.42 is: 43,871.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,642.90 : 69,888.94 = 31,790.42 : x
  2. Step 2: Convert to fraction form
    50,642.90/69,888.94 = 31,790.42/x
  3. Step 3: Cross multiply
    50,642.90x = 69,888.94 × 31,790.42
  4. Step 4: Simplify right side
    50,642.90x = 2,221,798,755.95
  5. Step 5: Solve for x
    x = 2,221,798,755.95/50,642.90
  6. Step 6: Final answer
    x = 43,871.87

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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.