Home / 100,165.20-138,238.95-63,867.93

Finding the Fourth Proportional to 100,165.20, 138,238.95 and 63,867.93

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Solution

The fourth proportional to 100,165.20, 138,238.95 and 63,867.93 is: 88,144.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,165.20 : 138,238.95 = 63,867.93 : x
  2. Step 2: Convert to fraction form
    100,165.20/138,238.95 = 63,867.93/x
  3. Step 3: Cross multiply
    100,165.20x = 138,238.95 × 63,867.93
  4. Step 4: Simplify right side
    100,165.20x = 8,829,035,581.87
  5. Step 5: Solve for x
    x = 8,829,035,581.87/100,165.20
  6. Step 6: Final answer
    x = 88,144.74

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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.