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Finding the Fourth Proportional to 78,494.80, 108,353.64 and 55,644.06

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Solution

The fourth proportional to 78,494.80, 108,353.64 and 55,644.06 is: 76,810.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,494.80 : 108,353.64 = 55,644.06 : x
  2. Step 2: Convert to fraction form
    78,494.80/108,353.64 = 55,644.06/x
  3. Step 3: Cross multiply
    78,494.80x = 108,353.64 × 55,644.06
  4. Step 4: Simplify right side
    78,494.80x = 6,029,235,981.38
  5. Step 5: Solve for x
    x = 6,029,235,981.38/78,494.80
  6. Step 6: Final answer
    x = 76,810.64

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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.