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Finding the Fourth Proportional to 138,952.55, 191,754.69 and 75,290.30

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Solution

The fourth proportional to 138,952.55, 191,754.69 and 75,290.30 is: 103,900.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,952.55 : 191,754.69 = 75,290.30 : x
  2. Step 2: Convert to fraction form
    138,952.55/191,754.69 = 75,290.30/x
  3. Step 3: Cross multiply
    138,952.55x = 191,754.69 × 75,290.30
  4. Step 4: Simplify right side
    138,952.55x = 14,437,268,136.51
  5. Step 5: Solve for x
    x = 14,437,268,136.51/138,952.55
  6. Step 6: Final answer
    x = 103,900.71

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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.