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Finding the Fourth Proportional to 76,387, 105,426.74 and 44,555.90

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Solution

The fourth proportional to 76,387, 105,426.74 and 44,555.90 is: 61,494.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,387 : 105,426.74 = 44,555.90 : x
  2. Step 2: Convert to fraction form
    76,387/105,426.74 = 44,555.90/x
  3. Step 3: Cross multiply
    76,387x = 105,426.74 × 44,555.90
  4. Step 4: Simplify right side
    76,387x = 4,697,383,284.77
  5. Step 5: Solve for x
    x = 4,697,383,284.77/76,387
  6. Step 6: Final answer
    x = 61,494.54

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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.