Home / 138,928.55-191,650.93-87,855.21

Finding the Fourth Proportional to 138,928.55, 191,650.93 and 87,855.21

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Solution

The fourth proportional to 138,928.55, 191,650.93 and 87,855.21 is: 121,195.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,928.55 : 191,650.93 = 87,855.21 : x
  2. Step 2: Convert to fraction form
    138,928.55/191,650.93 = 87,855.21/x
  3. Step 3: Cross multiply
    138,928.55x = 191,650.93 × 87,855.21
  4. Step 4: Simplify right side
    138,928.55x = 16,837,532,482.21
  5. Step 5: Solve for x
    x = 16,837,532,482.21/138,928.55
  6. Step 6: Final answer
    x = 121,195.63

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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.