Home / 100,320.24-138,453.44-57,306.50

Finding the Fourth Proportional to 100,320.24, 138,453.44 and 57,306.50

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Solution

The fourth proportional to 100,320.24, 138,453.44 and 57,306.50 is: 79,089.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,320.24 : 138,453.44 = 57,306.50 : x
  2. Step 2: Convert to fraction form
    100,320.24/138,453.44 = 57,306.50/x
  3. Step 3: Cross multiply
    100,320.24x = 138,453.44 × 57,306.50
  4. Step 4: Simplify right side
    100,320.24x = 7,934,282,059.36
  5. Step 5: Solve for x
    x = 7,934,282,059.36/100,320.24
  6. Step 6: Final answer
    x = 79,089.54

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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.