Home / 55,139.70-82,515.15-38,421.30

Finding the Fourth Proportional to 55,139.70, 82,515.15 and 38,421.30

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Solution

The fourth proportional to 55,139.70, 82,515.15 and 38,421.30 is: 57,496.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139.70 : 82,515.15 = 38,421.30 : x
  2. Step 2: Convert to fraction form
    55,139.70/82,515.15 = 38,421.30/x
  3. Step 3: Cross multiply
    55,139.70x = 82,515.15 × 38,421.30
  4. Step 4: Simplify right side
    55,139.70x = 3,170,339,332.70
  5. Step 5: Solve for x
    x = 3,170,339,332.70/55,139.70
  6. Step 6: Final answer
    x = 57,496.49

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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.