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Finding the Fourth Proportional to 76,699.70, 115,049.55 and 21,295.70

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Solution

The fourth proportional to 76,699.70, 115,049.55 and 21,295.70 is: 31,943.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,699.70 : 115,049.55 = 21,295.70 : x
  2. Step 2: Convert to fraction form
    76,699.70/115,049.55 = 21,295.70/x
  3. Step 3: Cross multiply
    76,699.70x = 115,049.55 × 21,295.70
  4. Step 4: Simplify right side
    76,699.70x = 2,450,060,701.94
  5. Step 5: Solve for x
    x = 2,450,060,701.94/76,699.70
  6. Step 6: Final answer
    x = 31,943.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.