Home / 142,021.12-213,141.68-53,355.20

Finding the Fourth Proportional to 142,021.12, 213,141.68 and 53,355.20

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Solution

The fourth proportional to 142,021.12, 213,141.68 and 53,355.20 is: 80,074.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,021.12 : 213,141.68 = 53,355.20 : x
  2. Step 2: Convert to fraction form
    142,021.12/213,141.68 = 53,355.20/x
  3. Step 3: Cross multiply
    142,021.12x = 213,141.68 × 53,355.20
  4. Step 4: Simplify right side
    142,021.12x = 11,372,216,964.74
  5. Step 5: Solve for x
    x = 11,372,216,964.74/142,021.12
  6. Step 6: Final answer
    x = 80,074.13

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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.