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Finding the Fourth Proportional to 78,905.81, 108,875.58 and 44,912.31

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Solution

The fourth proportional to 78,905.81, 108,875.58 and 44,912.31 is: 61,970.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,905.81 : 108,875.58 = 44,912.31 : x
  2. Step 2: Convert to fraction form
    78,905.81/108,875.58 = 44,912.31/x
  3. Step 3: Cross multiply
    78,905.81x = 108,875.58 × 44,912.31
  4. Step 4: Simplify right side
    78,905.81x = 4,889,853,223.69
  5. Step 5: Solve for x
    x = 4,889,853,223.69/78,905.81
  6. Step 6: Final answer
    x = 61,970.76

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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.