Home / 56,185.68-84,287.64-21,128.16

Finding the Fourth Proportional to 56,185.68, 84,287.64 and 21,128.16

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Solution

The fourth proportional to 56,185.68, 84,287.64 and 21,128.16 is: 31,695.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,185.68 : 84,287.64 = 21,128.16 : x
  2. Step 2: Convert to fraction form
    56,185.68/84,287.64 = 21,128.16/x
  3. Step 3: Cross multiply
    56,185.68x = 84,287.64 × 21,128.16
  4. Step 4: Simplify right side
    56,185.68x = 1,780,842,743.94
  5. Step 5: Solve for x
    x = 1,780,842,743.94/56,185.68
  6. Step 6: Final answer
    x = 31,695.67

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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.