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Finding the Fourth Proportional to 55,674, 83,505.60 and 20,613.60

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Solution

The fourth proportional to 55,674, 83,505.60 and 20,613.60 is: 30,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,674 : 83,505.60 = 20,613.60 : x
  2. Step 2: Convert to fraction form
    55,674/83,505.60 = 20,613.60/x
  3. Step 3: Cross multiply
    55,674x = 83,505.60 × 20,613.60
  4. Step 4: Simplify right side
    55,674x = 1,721,351,036.16
  5. Step 5: Solve for x
    x = 1,721,351,036.16/55,674
  6. Step 6: Final answer
    x = 30,918.40

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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.