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Finding the Fourth Proportional to 78,955.81, 108,954.42 and 43,146.11

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Solution

The fourth proportional to 78,955.81, 108,954.42 and 43,146.11 is: 59,539.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.81 : 108,954.42 = 43,146.11 : x
  2. Step 2: Convert to fraction form
    78,955.81/108,954.42 = 43,146.11/x
  3. Step 3: Cross multiply
    78,955.81x = 108,954.42 × 43,146.11
  4. Step 4: Simplify right side
    78,955.81x = 4,700,959,390.31
  5. Step 5: Solve for x
    x = 4,700,959,390.31/78,955.81
  6. Step 6: Final answer
    x = 59,539.12

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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.