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Finding the Fourth Proportional to 50,421, 75,624.78 and 17,139.72

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Solution

The fourth proportional to 50,421, 75,624.78 and 17,139.72 is: 25,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,421 : 75,624.78 = 17,139.72 : x
  2. Step 2: Convert to fraction form
    50,421/75,624.78 = 17,139.72/x
  3. Step 3: Cross multiply
    50,421x = 75,624.78 × 17,139.72
  4. Step 4: Simplify right side
    50,421x = 1,296,187,554.26
  5. Step 5: Solve for x
    x = 1,296,187,554.26/50,421
  6. Step 6: Final answer
    x = 25,707.30

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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.