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Finding the Fourth Proportional to 55,139, 82,642.62 and 20,037.56

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Solution

The fourth proportional to 55,139, 82,642.62 and 20,037.56 is: 30,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139 : 82,642.62 = 20,037.56 : x
  2. Step 2: Convert to fraction form
    55,139/82,642.62 = 20,037.56/x
  3. Step 3: Cross multiply
    55,139x = 82,642.62 × 20,037.56
  4. Step 4: Simplify right side
    55,139x = 1,655,956,456.81
  5. Step 5: Solve for x
    x = 1,655,956,456.81/55,139
  6. Step 6: Final answer
    x = 30,032.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.