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Finding the Fourth Proportional to 335,451.68, 503,182.64 and 86,128.16

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Solution

The fourth proportional to 335,451.68, 503,182.64 and 86,128.16 is: 129,193.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,451.68 : 503,182.64 = 86,128.16 : x
  2. Step 2: Convert to fraction form
    335,451.68/503,182.64 = 86,128.16/x
  3. Step 3: Cross multiply
    335,451.68x = 503,182.64 × 86,128.16
  4. Step 4: Simplify right side
    335,451.68x = 43,338,194,927.14
  5. Step 5: Solve for x
    x = 43,338,194,927.14/335,451.68
  6. Step 6: Final answer
    x = 129,193.55

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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.