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Finding the Fourth Proportional to 86,009.39, 118,689.01 and 47,771.38

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Solution

The fourth proportional to 86,009.39, 118,689.01 and 47,771.38 is: 65,922.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,009.39 : 118,689.01 = 47,771.38 : x
  2. Step 2: Convert to fraction form
    86,009.39/118,689.01 = 47,771.38/x
  3. Step 3: Cross multiply
    86,009.39x = 118,689.01 × 47,771.38
  4. Step 4: Simplify right side
    86,009.39x = 5,669,937,798.53
  5. Step 5: Solve for x
    x = 5,669,937,798.53/86,009.39
  6. Step 6: Final answer
    x = 65,922.31

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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.