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Finding the Fourth Proportional to 100,358.11, 138,496.10 and 55,033.40

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Solution

The fourth proportional to 100,358.11, 138,496.10 and 55,033.40 is: 75,947.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,358.11 : 138,496.10 = 55,033.40 : x
  2. Step 2: Convert to fraction form
    100,358.11/138,496.10 = 55,033.40/x
  3. Step 3: Cross multiply
    100,358.11x = 138,496.10 × 55,033.40
  4. Step 4: Simplify right side
    100,358.11x = 7,621,911,415.64
  5. Step 5: Solve for x
    x = 7,621,911,415.64/100,358.11
  6. Step 6: Final answer
    x = 75,947.14

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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.