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Finding the Fourth Proportional to 61,190.40, 91,785.60 and 58,857.60

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Solution

The fourth proportional to 61,190.40, 91,785.60 and 58,857.60 is: 88,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,190.40 : 91,785.60 = 58,857.60 : x
  2. Step 2: Convert to fraction form
    61,190.40/91,785.60 = 58,857.60/x
  3. Step 3: Cross multiply
    61,190.40x = 91,785.60 × 58,857.60
  4. Step 4: Simplify right side
    61,190.40x = 5,402,280,130.56
  5. Step 5: Solve for x
    x = 5,402,280,130.56/61,190.40
  6. Step 6: Final answer
    x = 88,286.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.