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Finding the Fourth Proportional to 76,295.78, 105,286.29 and 42,304.40

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Solution

The fourth proportional to 76,295.78, 105,286.29 and 42,304.40 is: 58,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,295.78 : 105,286.29 = 42,304.40 : x
  2. Step 2: Convert to fraction form
    76,295.78/105,286.29 = 42,304.40/x
  3. Step 3: Cross multiply
    76,295.78x = 105,286.29 × 42,304.40
  4. Step 4: Simplify right side
    76,295.78x = 4,454,073,326.68
  5. Step 5: Solve for x
    x = 4,454,073,326.68/76,295.78
  6. Step 6: Final answer
    x = 58,379.03

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1.5x scale

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.