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Finding the Fourth Proportional to 86,013.48, 118,694.57 and 47,775.51

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Solution

The fourth proportional to 86,013.48, 118,694.57 and 47,775.51 is: 65,927.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,013.48 : 118,694.57 = 47,775.51 : x
  2. Step 2: Convert to fraction form
    86,013.48/118,694.57 = 47,775.51/x
  3. Step 3: Cross multiply
    86,013.48x = 118,694.57 × 47,775.51
  4. Step 4: Simplify right side
    86,013.48x = 5,670,693,377.10
  5. Step 5: Solve for x
    x = 5,670,693,377.10/86,013.48
  6. Step 6: Final answer
    x = 65,927.96

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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.