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Finding the Fourth Proportional to 91,287.88, 125,972.80 and 50,993.64

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Solution

The fourth proportional to 91,287.88, 125,972.80 and 50,993.64 is: 70,368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,287.88 : 125,972.80 = 50,993.64 : x
  2. Step 2: Convert to fraction form
    91,287.88/125,972.80 = 50,993.64/x
  3. Step 3: Cross multiply
    91,287.88x = 125,972.80 × 50,993.64
  4. Step 4: Simplify right side
    91,287.88x = 6,423,811,612.99
  5. Step 5: Solve for x
    x = 6,423,811,612.99/91,287.88
  6. Step 6: Final answer
    x = 70,368.72

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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.