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Finding the Fourth Proportional to 100,357.83, 138,496.86 and 55,037.70

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Solution

The fourth proportional to 100,357.83, 138,496.86 and 55,037.70 is: 75,953.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,357.83 : 138,496.86 = 55,037.70 : x
  2. Step 2: Convert to fraction form
    100,357.83/138,496.86 = 55,037.70/x
  3. Step 3: Cross multiply
    100,357.83x = 138,496.86 × 55,037.70
  4. Step 4: Simplify right side
    100,357.83x = 7,622,548,631.62
  5. Step 5: Solve for x
    x = 7,622,548,631.62/100,357.83
  6. Step 6: Final answer
    x = 75,953.70

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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.