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Finding the Fourth Proportional to 86,117.86, 118,846.69 and 47,878.03

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Solution

The fourth proportional to 86,117.86, 118,846.69 and 47,878.03 is: 66,073.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,117.86 : 118,846.69 = 47,878.03 : x
  2. Step 2: Convert to fraction form
    86,117.86/118,846.69 = 47,878.03/x
  3. Step 3: Cross multiply
    86,117.86x = 118,846.69 × 47,878.03
  4. Step 4: Simplify right side
    86,117.86x = 5,690,145,149.83
  5. Step 5: Solve for x
    x = 5,690,145,149.83/86,117.86
  6. Step 6: Final answer
    x = 66,073.93

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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.