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Finding the Fourth Proportional to 85,607.50, 118,138.81 and 47,881.74

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Solution

The fourth proportional to 85,607.50, 118,138.81 and 47,881.74 is: 66,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,607.50 : 118,138.81 = 47,881.74 : x
  2. Step 2: Convert to fraction form
    85,607.50/118,138.81 = 47,881.74/x
  3. Step 3: Cross multiply
    85,607.50x = 118,138.81 × 47,881.74
  4. Step 4: Simplify right side
    85,607.50x = 5,656,691,784.33
  5. Step 5: Solve for x
    x = 5,656,691,784.33/85,607.50
  6. Step 6: Final answer
    x = 66,077.06

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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.