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Finding the Fourth Proportional to 58,403.40, 87,619.02 and 18,960.60

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Solution

The fourth proportional to 58,403.40, 87,619.02 and 18,960.60 is: 28,445.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,403.40 : 87,619.02 = 18,960.60 : x
  2. Step 2: Convert to fraction form
    58,403.40/87,619.02 = 18,960.60/x
  3. Step 3: Cross multiply
    58,403.40x = 87,619.02 × 18,960.60
  4. Step 4: Simplify right side
    58,403.40x = 1,661,309,190.61
  5. Step 5: Solve for x
    x = 1,661,309,190.61/58,403.40
  6. Step 6: Final answer
    x = 28,445.42

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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.