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Finding the Fourth Proportional to 109,501.88, 150,975.70 and 91,378.63

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Solution

The fourth proportional to 109,501.88, 150,975.70 and 91,378.63 is: 125,988.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,501.88 : 150,975.70 = 91,378.63 : x
  2. Step 2: Convert to fraction form
    109,501.88/150,975.70 = 91,378.63/x
  3. Step 3: Cross multiply
    109,501.88x = 150,975.70 × 91,378.63
  4. Step 4: Simplify right side
    109,501.88x = 13,795,952,589.56
  5. Step 5: Solve for x
    x = 13,795,952,589.56/109,501.88
  6. Step 6: Final answer
    x = 125,988.28

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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.