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Finding the Fourth Proportional to 86,710.44, 129,929.58 and 51,630.96

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Solution

The fourth proportional to 86,710.44, 129,929.58 and 51,630.96 is: 77,365.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,710.44 : 129,929.58 = 51,630.96 : x
  2. Step 2: Convert to fraction form
    86,710.44/129,929.58 = 51,630.96/x
  3. Step 3: Cross multiply
    86,710.44x = 129,929.58 × 51,630.96
  4. Step 4: Simplify right side
    86,710.44x = 6,708,388,947.80
  5. Step 5: Solve for x
    x = 6,708,388,947.80/86,710.44
  6. Step 6: Final answer
    x = 77,365.41

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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.