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Finding the Fourth Proportional to 76,469.97, 105,499.08 and 56,374.56

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Solution

The fourth proportional to 76,469.97, 105,499.08 and 56,374.56 is: 77,775.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,469.97 : 105,499.08 = 56,374.56 : x
  2. Step 2: Convert to fraction form
    76,469.97/105,499.08 = 56,374.56/x
  3. Step 3: Cross multiply
    76,469.97x = 105,499.08 × 56,374.56
  4. Step 4: Simplify right side
    76,469.97x = 5,947,464,215.40
  5. Step 5: Solve for x
    x = 5,947,464,215.40/76,469.97
  6. Step 6: Final answer
    x = 77,775.16

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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.