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Finding the Fourth Proportional to 78,660.40, 108,553.64 and 44,667.68

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Solution

The fourth proportional to 78,660.40, 108,553.64 and 44,667.68 is: 61,642.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,660.40 : 108,553.64 = 44,667.68 : x
  2. Step 2: Convert to fraction form
    78,660.40/108,553.64 = 44,667.68/x
  3. Step 3: Cross multiply
    78,660.40x = 108,553.64 × 44,667.68
  4. Step 4: Simplify right side
    78,660.40x = 4,848,839,254.36
  5. Step 5: Solve for x
    x = 4,848,839,254.36/78,660.40
  6. Step 6: Final answer
    x = 61,642.70

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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.