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Finding the Fourth Proportional to 76,515.93, 105,333.48 and 63,065.88

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Solution

The fourth proportional to 76,515.93, 105,333.48 and 63,065.88 is: 86,817.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,515.93 : 105,333.48 = 63,065.88 : x
  2. Step 2: Convert to fraction form
    76,515.93/105,333.48 = 63,065.88/x
  3. Step 3: Cross multiply
    76,515.93x = 105,333.48 × 63,065.88
  4. Step 4: Simplify right side
    76,515.93x = 6,642,948,609.66
  5. Step 5: Solve for x
    x = 6,642,948,609.66/76,515.93
  6. Step 6: Final answer
    x = 86,817.85

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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.