Home / 100,725.08-138,990.95-55,402.34

Finding the Fourth Proportional to 100,725.08, 138,990.95 and 55,402.34

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Solution

The fourth proportional to 100,725.08, 138,990.95 and 55,402.34 is: 76,449.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.08 : 138,990.95 = 55,402.34 : x
  2. Step 2: Convert to fraction form
    100,725.08/138,990.95 = 55,402.34/x
  3. Step 3: Cross multiply
    100,725.08x = 138,990.95 × 55,402.34
  4. Step 4: Simplify right side
    100,725.08x = 7,700,422,896.86
  5. Step 5: Solve for x
    x = 7,700,422,896.86/100,725.08
  6. Step 6: Final answer
    x = 76,449.91

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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.