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Finding the Fourth Proportional to 81,673.81, 112,708.53 and 45,374.47

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Solution

The fourth proportional to 81,673.81, 112,708.53 and 45,374.47 is: 62,616.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,673.81 : 112,708.53 = 45,374.47 : x
  2. Step 2: Convert to fraction form
    81,673.81/112,708.53 = 45,374.47/x
  3. Step 3: Cross multiply
    81,673.81x = 112,708.53 × 45,374.47
  4. Step 4: Simplify right side
    81,673.81x = 5,114,089,531.46
  5. Step 5: Solve for x
    x = 5,114,089,531.46/81,673.81
  6. Step 6: Final answer
    x = 62,616.03

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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.