Home / 85,786.15-118,356.51-51,781.72

Finding the Fourth Proportional to 85,786.15, 118,356.51 and 51,781.72

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Solution

The fourth proportional to 85,786.15, 118,356.51 and 51,781.72 is: 71,441.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,786.15 : 118,356.51 = 51,781.72 : x
  2. Step 2: Convert to fraction form
    85,786.15/118,356.51 = 51,781.72/x
  3. Step 3: Cross multiply
    85,786.15x = 118,356.51 × 51,781.72
  4. Step 4: Simplify right side
    85,786.15x = 6,128,703,661.00
  5. Step 5: Solve for x
    x = 6,128,703,661.00/85,786.15
  6. Step 6: Final answer
    x = 71,441.64

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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.