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Finding the Fourth Proportional to 85,871.12, 118,477.89 and 55,657.71

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Solution

The fourth proportional to 85,871.12, 118,477.89 and 55,657.71 is: 76,791.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,871.12 : 118,477.89 = 55,657.71 : x
  2. Step 2: Convert to fraction form
    85,871.12/118,477.89 = 55,657.71/x
  3. Step 3: Cross multiply
    85,871.12x = 118,477.89 × 55,657.71
  4. Step 4: Simplify right side
    85,871.12x = 6,594,208,043.03
  5. Step 5: Solve for x
    x = 6,594,208,043.03/85,871.12
  6. Step 6: Final answer
    x = 76,791.92

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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.