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Finding the Fourth Proportional to 100,481.48, 138,660.86 and 56,873.10

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Solution

The fourth proportional to 100,481.48, 138,660.86 and 56,873.10 is: 78,482.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,481.48 : 138,660.86 = 56,873.10 : x
  2. Step 2: Convert to fraction form
    100,481.48/138,660.86 = 56,873.10/x
  3. Step 3: Cross multiply
    100,481.48x = 138,660.86 × 56,873.10
  4. Step 4: Simplify right side
    100,481.48x = 7,886,072,956.87
  5. Step 5: Solve for x
    x = 7,886,072,956.87/100,481.48
  6. Step 6: Final answer
    x = 78,482.85

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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.