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Finding the Fourth Proportional to 76,371.44, 105,391.30 and 42,836.72

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Solution

The fourth proportional to 76,371.44, 105,391.30 and 42,836.72 is: 59,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,371.44 : 105,391.30 = 42,836.72 : x
  2. Step 2: Convert to fraction form
    76,371.44/105,391.30 = 42,836.72/x
  3. Step 3: Cross multiply
    76,371.44x = 105,391.30 × 42,836.72
  4. Step 4: Simplify right side
    76,371.44x = 4,514,617,608.54
  5. Step 5: Solve for x
    x = 4,514,617,608.54/76,371.44
  6. Step 6: Final answer
    x = 59,113.95

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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.