Home / 138,933.65-191,728.63-75,271.45

Finding the Fourth Proportional to 138,933.65, 191,728.63 and 75,271.45

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Solution

The fourth proportional to 138,933.65, 191,728.63 and 75,271.45 is: 103,874.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,933.65 : 191,728.63 = 75,271.45 : x
  2. Step 2: Convert to fraction form
    138,933.65/191,728.63 = 75,271.45/x
  3. Step 3: Cross multiply
    138,933.65x = 191,728.63 × 75,271.45
  4. Step 4: Simplify right side
    138,933.65x = 14,431,691,986.61
  5. Step 5: Solve for x
    x = 14,431,691,986.61/138,933.65
  6. Step 6: Final answer
    x = 103,874.71

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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.