Home / 100,003.18-138,004.40-54,685.34

Finding the Fourth Proportional to 100,003.18, 138,004.40 and 54,685.34

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Solution

The fourth proportional to 100,003.18, 138,004.40 and 54,685.34 is: 75,465.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,003.18 : 138,004.40 = 54,685.34 : x
  2. Step 2: Convert to fraction form
    100,003.18/138,004.40 = 54,685.34/x
  3. Step 3: Cross multiply
    100,003.18x = 138,004.40 × 54,685.34
  4. Step 4: Simplify right side
    100,003.18x = 7,546,817,535.50
  5. Step 5: Solve for x
    x = 7,546,817,535.50/100,003.18
  6. Step 6: Final answer
    x = 75,465.78

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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.