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Finding the Fourth Proportional to 189,188.88, 261,077.04 and 103,148.64

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Solution

The fourth proportional to 189,188.88, 261,077.04 and 103,148.64 is: 142,343.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,188.88 : 261,077.04 = 103,148.64 : x
  2. Step 2: Convert to fraction form
    189,188.88/261,077.04 = 103,148.64/x
  3. Step 3: Cross multiply
    189,188.88x = 261,077.04 × 103,148.64
  4. Step 4: Simplify right side
    189,188.88x = 26,929,741,611.23
  5. Step 5: Solve for x
    x = 26,929,741,611.23/189,188.88
  6. Step 6: Final answer
    x = 142,343.15

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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.