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Finding the Fourth Proportional to 58,659.40, 87,989.10 and 57,784.60

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Solution

The fourth proportional to 58,659.40, 87,989.10 and 57,784.60 is: 86,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,659.40 : 87,989.10 = 57,784.60 : x
  2. Step 2: Convert to fraction form
    58,659.40/87,989.10 = 57,784.60/x
  3. Step 3: Cross multiply
    58,659.40x = 87,989.10 × 57,784.60
  4. Step 4: Simplify right side
    58,659.40x = 5,084,414,947.86
  5. Step 5: Solve for x
    x = 5,084,414,947.86/58,659.40
  6. Step 6: Final answer
    x = 86,676.90

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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.