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Finding the Fourth Proportional to 75,611.88, 113,242.86 and 72,987.48

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Solution

The fourth proportional to 75,611.88, 113,242.86 and 72,987.48 is: 109,312.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,611.88 : 113,242.86 = 72,987.48 : x
  2. Step 2: Convert to fraction form
    75,611.88/113,242.86 = 72,987.48/x
  3. Step 3: Cross multiply
    75,611.88x = 113,242.86 × 72,987.48
  4. Step 4: Simplify right side
    75,611.88x = 8,265,310,979.39
  5. Step 5: Solve for x
    x = 8,265,310,979.39/75,611.88
  6. Step 6: Final answer
    x = 109,312.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.