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Finding the Fourth Proportional to 76,708.98, 105,891.15 and 51,573.06

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Solution

The fourth proportional to 76,708.98, 105,891.15 and 51,573.06 is: 71,192.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,708.98 : 105,891.15 = 51,573.06 : x
  2. Step 2: Convert to fraction form
    76,708.98/105,891.15 = 51,573.06/x
  3. Step 3: Cross multiply
    76,708.98x = 105,891.15 × 51,573.06
  4. Step 4: Simplify right side
    76,708.98x = 5,461,130,632.42
  5. Step 5: Solve for x
    x = 5,461,130,632.42/76,708.98
  6. Step 6: Final answer
    x = 71,192.85

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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.