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Finding the Fourth Proportional to 86,377.69, 129,273.90 and 53,118.82

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Solution

The fourth proportional to 86,377.69, 129,273.90 and 53,118.82 is: 79,498.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,377.69 : 129,273.90 = 53,118.82 : x
  2. Step 2: Convert to fraction form
    86,377.69/129,273.90 = 53,118.82/x
  3. Step 3: Cross multiply
    86,377.69x = 129,273.90 × 53,118.82
  4. Step 4: Simplify right side
    86,377.69x = 6,866,877,024.80
  5. Step 5: Solve for x
    x = 6,866,877,024.80/86,377.69
  6. Step 6: Final answer
    x = 79,498.27

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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.