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Finding the Fourth Proportional to 78,306, 108,062.40 and 44,772.72

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Solution

The fourth proportional to 78,306, 108,062.40 and 44,772.72 is: 61,786.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,306 : 108,062.40 = 44,772.72 : x
  2. Step 2: Convert to fraction form
    78,306/108,062.40 = 44,772.72/x
  3. Step 3: Cross multiply
    78,306x = 108,062.40 × 44,772.72
  4. Step 4: Simplify right side
    78,306x = 4,838,247,577.73
  5. Step 5: Solve for x
    x = 4,838,247,577.73/78,306
  6. Step 6: Final answer
    x = 61,786.42

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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.