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Finding the Fourth Proportional to 138,786.52, 191,525.50 and 75,124.12

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Solution

The fourth proportional to 138,786.52, 191,525.50 and 75,124.12 is: 103,671.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,786.52 : 191,525.50 = 75,124.12 : x
  2. Step 2: Convert to fraction form
    138,786.52/191,525.50 = 75,124.12/x
  3. Step 3: Cross multiply
    138,786.52x = 191,525.50 × 75,124.12
  4. Step 4: Simplify right side
    138,786.52x = 14,388,184,645.06
  5. Step 5: Solve for x
    x = 14,388,184,645.06/138,786.52
  6. Step 6: Final answer
    x = 103,671.34

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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.